diff --git a/app/Console/Commands/Feed/ReadAndSyncEinundzwanzigPodcastFeed.php b/app/Console/Commands/Feed/ReadAndSyncEinundzwanzigPodcastFeed.php
index 7f71eaf4..ae711b64 100644
--- a/app/Console/Commands/Feed/ReadAndSyncEinundzwanzigPodcastFeed.php
+++ b/app/Console/Commands/Feed/ReadAndSyncEinundzwanzigPodcastFeed.php
@@ -39,6 +39,7 @@ class ReadAndSyncEinundzwanzigPodcastFeed extends Command
                                            'link'     => $podcast->feed->link,
                                            'language_code' => $podcast->feed->language,
                                            'data'     => $podcast->feed,
+                                           'created_by'  => 1,
                                        ]);
         $episodes = $client->episodes->byFeedUrl('https://einundzwanzig.space/feed.xml')
                                      ->json();
@@ -47,6 +48,7 @@ class ReadAndSyncEinundzwanzigPodcastFeed extends Command
                    ->updateOrCreate(['guid' => $item->guid], [
                        'podcast_id' => $einundzwanzigPodcast->id,
                        'data'       => $item,
+                       'created_by'  => 1,
                    ]);
         }
 
diff --git a/app/Console/Commands/OpenBooks/SyncOpenBooks.php b/app/Console/Commands/OpenBooks/SyncOpenBooks.php
index 38142d47..345feb51 100644
--- a/app/Console/Commands/OpenBooks/SyncOpenBooks.php
+++ b/app/Console/Commands/OpenBooks/SyncOpenBooks.php
@@ -49,6 +49,7 @@ class SyncOpenBooks extends Command
                     'deactreason' => $case['deactreason'],
                     'entrytype'   => $case['entrytype'],
                     'homepage'    => $case['homepage'],
+                    'created_by'  => 1,
                 ]
             );
         }
diff --git a/app/Models/BitcoinEvent.php b/app/Models/BitcoinEvent.php
index eaa4c244..a50ca933 100644
--- a/app/Models/BitcoinEvent.php
+++ b/app/Models/BitcoinEvent.php
@@ -51,6 +51,11 @@ class BitcoinEvent extends Model implements HasMedia
              ->useFallbackUrl(asset('img/einundzwanzig-cover-lesestunde.png'));
     }
 
+    public function createdBy(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
     public function venue(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(Venue::class);
diff --git a/app/Models/BookCase.php b/app/Models/BookCase.php
index ab792f8b..f7d59868 100644
--- a/app/Models/BookCase.php
+++ b/app/Models/BookCase.php
@@ -54,6 +54,11 @@ class BookCase extends Model implements HasMedia
         $this->addMediaCollection('images');
     }
 
+    public function createdBy(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
     public function orangePills(): HasMany
     {
         return $this->hasMany(OrangePill::class);
diff --git a/app/Models/City.php b/app/Models/City.php
index b5d23ff1..b4c8c321 100644
--- a/app/Models/City.php
+++ b/app/Models/City.php
@@ -40,6 +40,11 @@ class City extends Model
                           ->usingLanguage('de');
     }
 
+    public function createdBy(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
     public function country(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(Country::class);
diff --git a/app/Models/Course.php b/app/Models/Course.php
index 4e2301cc..fe4a41ab 100644
--- a/app/Models/Course.php
+++ b/app/Models/Course.php
@@ -54,6 +54,11 @@ class Course extends Model implements HasMedia
              ->useFallbackUrl(asset('img/einundzwanzig-cover-lesestunde.png'));
     }
 
+    public function createdBy(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
     public function categories(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
     {
         return $this->belongsToMany(Category::class);
diff --git a/app/Models/CourseEvent.php b/app/Models/CourseEvent.php
index 53263274..f97bf297 100644
--- a/app/Models/CourseEvent.php
+++ b/app/Models/CourseEvent.php
@@ -29,6 +29,11 @@ class CourseEvent extends Model
         'to' => 'datetime',
     ];
 
+    public function createdBy(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
     public function course(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(Course::class);
diff --git a/app/Models/Episode.php b/app/Models/Episode.php
index 4b62d5e7..c78667bd 100644
--- a/app/Models/Episode.php
+++ b/app/Models/Episode.php
@@ -28,6 +28,11 @@ class Episode extends Model
         'data'       => 'array',
     ];
 
+    public function createdBy(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
     public function podcast(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(Podcast::class);
diff --git a/app/Models/Lecturer.php b/app/Models/Lecturer.php
index 844a4093..3a4cb149 100644
--- a/app/Models/Lecturer.php
+++ b/app/Models/Lecturer.php
@@ -64,6 +64,11 @@ class Lecturer extends Model implements HasMedia
                           ->usingLanguage('de');
     }
 
+    public function createdBy(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
     public function team(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(Team::class);
diff --git a/app/Models/Library.php b/app/Models/Library.php
index 3fb15bdd..d20245b0 100644
--- a/app/Models/Library.php
+++ b/app/Models/Library.php
@@ -26,6 +26,11 @@ class Library extends Model
         'language_codes' => 'array',
     ];
 
+    public function createdBy(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
     public function libraryItems(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
     {
         return $this->belongsToMany(LibraryItem::class);
diff --git a/app/Models/LibraryItem.php b/app/Models/LibraryItem.php
index 7a813afa..fa19df37 100644
--- a/app/Models/LibraryItem.php
+++ b/app/Models/LibraryItem.php
@@ -59,6 +59,11 @@ class LibraryItem extends Model implements HasMedia, Sortable
              ->useFallbackUrl(asset('img/einundzwanzig-cover-lesestunde.png'));
     }
 
+    public function createdBy(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
     public function lecturer(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(Lecturer::class);
diff --git a/app/Models/Meetup.php b/app/Models/Meetup.php
index 5ab46043..1e17c575 100644
--- a/app/Models/Meetup.php
+++ b/app/Models/Meetup.php
@@ -48,6 +48,11 @@ class Meetup extends Model implements HasMedia
              ->useFallbackUrl(asset('img/einundzwanzig-cover-lesestunde.png'));
     }
 
+    public function createdBy(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
     public function city(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(City::class);
diff --git a/app/Models/MeetupEvent.php b/app/Models/MeetupEvent.php
index 5cb14f6d..00f4cfa6 100644
--- a/app/Models/MeetupEvent.php
+++ b/app/Models/MeetupEvent.php
@@ -27,6 +27,11 @@ class MeetupEvent extends Model
         'start' => 'datetime',
     ];
 
+    public function createdBy(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
     public function meetup(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(Meetup::class);
diff --git a/app/Models/Podcast.php b/app/Models/Podcast.php
index c6e8c506..979405ff 100644
--- a/app/Models/Podcast.php
+++ b/app/Models/Podcast.php
@@ -25,6 +25,11 @@ class Podcast extends Model
         'data' => 'array',
     ];
 
+    public function createdBy(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
     public function episodes(): HasMany
     {
         return $this->hasMany(Episode::class);
diff --git a/app/Models/Venue.php b/app/Models/Venue.php
index 2bbaabe3..fabec0cf 100644
--- a/app/Models/Venue.php
+++ b/app/Models/Venue.php
@@ -63,6 +63,11 @@ class Venue extends Model implements HasMedia
                           ->usingLanguage('de');
     }
 
+    public function createdBy(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
     public function city(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(City::class);
diff --git a/app/Nova/BitcoinEvent.php b/app/Nova/BitcoinEvent.php
index 9cc49bb3..0d0c4fd3 100644
--- a/app/Nova/BitcoinEvent.php
+++ b/app/Nova/BitcoinEvent.php
@@ -66,6 +66,8 @@ class BitcoinEvent extends Resource
 
             BelongsTo::make(__('Venue'), 'venue', Venue::class)->searchable(),
 
+            BelongsTo::make(__('Created By'), 'createdBy', User::class),
+
         ];
     }
 
diff --git a/app/Nova/BookCase.php b/app/Nova/BookCase.php
index caf83858..ff0315ee 100644
--- a/app/Nova/BookCase.php
+++ b/app/Nova/BookCase.php
@@ -3,6 +3,7 @@
 namespace App\Nova;
 
 use Illuminate\Http\Request;
+use Laravel\Nova\Fields\BelongsTo;
 use Laravel\Nova\Fields\Boolean;
 use Laravel\Nova\Fields\HasMany;
 use Laravel\Nova\Fields\ID;
@@ -112,6 +113,8 @@ class BookCase extends Resource
 
             MorphMany::make(__('Comments'), 'comments', Comment::class),
 
+            BelongsTo::make(__('Created By'), 'createdBy', User::class),
+
         ];
     }
 
diff --git a/app/Nova/City.php b/app/Nova/City.php
index 8f85a787..a1bdc6b7 100644
--- a/app/Nova/City.php
+++ b/app/Nova/City.php
@@ -75,6 +75,8 @@ class City extends Resource
 
             HasMany::make(__('Meetups'), 'meetups', Meetup::class),
 
+            BelongsTo::make(__('Created By'), 'createdBy', User::class),
+
         ];
     }
 
diff --git a/app/Nova/Course.php b/app/Nova/Course.php
index 67a2abc4..fdabda88 100644
--- a/app/Nova/Course.php
+++ b/app/Nova/Course.php
@@ -98,6 +98,8 @@ class Course extends Resource
             BelongsToMany::make(__('Categories'), 'categories', Category::class)
                          ->onlyOnDetail(),
 
+            BelongsTo::make(__('Created By'), 'createdBy', User::class),
+
         ];
     }
 
diff --git a/app/Nova/CourseEvent.php b/app/Nova/CourseEvent.php
index c6cd93cb..255f8fc4 100644
--- a/app/Nova/CourseEvent.php
+++ b/app/Nova/CourseEvent.php
@@ -79,6 +79,8 @@ class CourseEvent extends Resource
             BelongsTo::make(__('Venue'), 'venue', Venue::class)
                      ->searchable(),
 
+            BelongsTo::make(__('Created By'), 'createdBy', User::class),
+
         ];
     }
 
diff --git a/app/Nova/Episode.php b/app/Nova/Episode.php
index 38834317..1379d473 100644
--- a/app/Nova/Episode.php
+++ b/app/Nova/Episode.php
@@ -52,7 +52,6 @@ class Episode extends Resource
                                      'language_code' => $model->podcast->language_code,
                                      'value'         => null,
                                  ]);
-            ray($request->tags);
             $libraryItem->syncTagsWithType(is_array($request->tags) ? $request->tags : str($request->tags)->explode('-----'),
                 'library_item');
             $libraryItem->addMediaFromUrl($model->data['image'])
@@ -103,6 +102,8 @@ class Episode extends Resource
             BelongsTo::make(__('Podcast'), 'podcast', Podcast::class)
                      ->readonly(),
 
+            BelongsTo::make(__('Created By'), 'createdBy', User::class),
+
         ];
     }
 
diff --git a/app/Nova/Lecturer.php b/app/Nova/Lecturer.php
index 2fe85ba0..b3105a81 100644
--- a/app/Nova/Lecturer.php
+++ b/app/Nova/Lecturer.php
@@ -86,6 +86,8 @@ class Lecturer extends Resource
 
             BelongsTo::make('Team'),
 
+            BelongsTo::make(__('Created By'), 'createdBy', User::class),
+
         ];
     }
 
diff --git a/app/Nova/Library.php b/app/Nova/Library.php
index f64e2b4d..5443c4f1 100644
--- a/app/Nova/Library.php
+++ b/app/Nova/Library.php
@@ -3,6 +3,7 @@
 namespace App\Nova;
 
 use Illuminate\Http\Request;
+use Laravel\Nova\Fields\BelongsTo;
 use Laravel\Nova\Fields\BelongsToMany;
 use Laravel\Nova\Fields\Boolean;
 use Laravel\Nova\Fields\ID;
@@ -62,6 +63,9 @@ class Library extends Resource
                        ),
 
             BelongsToMany::make('Library Items'),
+
+            BelongsTo::make(__('Created By'), 'createdBy', User::class),
+
         ];
     }
 
diff --git a/app/Nova/LibraryItem.php b/app/Nova/LibraryItem.php
index c2152d2b..c1bbd1ee 100644
--- a/app/Nova/LibraryItem.php
+++ b/app/Nova/LibraryItem.php
@@ -95,6 +95,8 @@ class LibraryItem extends Resource
 
             BelongsToMany::make(__('Library'), 'libraries', Library::class),
 
+            BelongsTo::make(__('Created By'), 'createdBy', User::class),
+
         ];
     }
 
diff --git a/app/Nova/Meetup.php b/app/Nova/Meetup.php
index 2f26a4e2..09fdcca4 100644
--- a/app/Nova/Meetup.php
+++ b/app/Nova/Meetup.php
@@ -56,6 +56,8 @@ class Meetup extends Resource
 
             BelongsTo::make(__('City'), 'city', City::class)->searchable(),
 
+            BelongsTo::make(__('Created By'), 'createdBy', User::class),
+
         ];
     }
 
diff --git a/app/Nova/MeetupEvent.php b/app/Nova/MeetupEvent.php
index f184a764..d45f74d2 100644
--- a/app/Nova/MeetupEvent.php
+++ b/app/Nova/MeetupEvent.php
@@ -62,6 +62,8 @@ class MeetupEvent extends Resource
             BelongsTo::make('Meetup')
                      ->searchable(),
 
+            BelongsTo::make(__('Created By'), 'createdBy', User::class),
+
         ];
     }
 
diff --git a/app/Nova/Podcast.php b/app/Nova/Podcast.php
index 60df6dfb..0be80a32 100644
--- a/app/Nova/Podcast.php
+++ b/app/Nova/Podcast.php
@@ -5,6 +5,7 @@ namespace App\Nova;
 use Illuminate\Http\Request;
 use Illuminate\Support\Str;
 use Laravel\Nova\Fields\Avatar;
+use Laravel\Nova\Fields\BelongsTo;
 use Laravel\Nova\Fields\Boolean;
 use Laravel\Nova\Fields\Code;
 use Laravel\Nova\Fields\HasMany;
@@ -80,6 +81,9 @@ class Podcast extends Resource
                 ->json(),
 
             HasMany::make(__('Episodes'), 'episodes', Episode::class),
+
+            BelongsTo::make(__('Created By'), 'createdBy', User::class),
+
         ];
     }
 
diff --git a/app/Nova/Venue.php b/app/Nova/Venue.php
index 0ac7cee9..c5fb6386 100644
--- a/app/Nova/Venue.php
+++ b/app/Nova/Venue.php
@@ -63,6 +63,8 @@ class Venue extends Resource
 
             BelongsTo::make(__('City'), 'city', City::class),
 
+            BelongsTo::make(__('Created By'), 'createdBy', User::class),
+
         ];
     }
 
diff --git a/app/Policies/BasePolicy.php b/app/Policies/BasePolicy.php
index a4d0a2b8..3a443dfe 100644
--- a/app/Policies/BasePolicy.php
+++ b/app/Policies/BasePolicy.php
@@ -16,7 +16,7 @@ class BasePolicy
      */
     public function before(User $user, $ability)
     {
-        if ($user->hasRole('super-admin') || app()->environment('local')) {
+        if ($user->hasRole('super-admin') || config('app.super-admin')) {
             return true;
         }
     }
diff --git a/app/Policies/BitcoinEventPolicy.php b/app/Policies/BitcoinEventPolicy.php
new file mode 100644
index 00000000..99073f3e
--- /dev/null
+++ b/app/Policies/BitcoinEventPolicy.php
@@ -0,0 +1,101 @@
+<?php
+
+namespace App\Policies;
+
+use App\Models\BitcoinEvent;
+use App\Models\User;
+use Illuminate\Auth\Access\HandlesAuthorization;
+
+class BitcoinEventPolicy extends BasePolicy
+{
+    use HandlesAuthorization;
+
+    /**
+     * Determine whether the user can view any models.
+     *
+     * @param  \App\Models\User  $user
+     *
+     * @return \Illuminate\Auth\Access\Response|bool
+     */
+    public function viewAny(User $user)
+    {
+        return true;
+    }
+
+    /**
+     * Determine whether the user can view the model.
+     *
+     * @param  \App\Models\User  $user
+     * @param  \App\Models\BitcoinEvent  $bitcoinEvent
+     *
+     * @return \Illuminate\Auth\Access\Response|bool
+     */
+    public function view(User $user, BitcoinEvent $bitcoinEvent)
+    {
+        return true;
+    }
+
+    /**
+     * Determine whether the user can create models.
+     *
+     * @param  \App\Models\User  $user
+     *
+     * @return \Illuminate\Auth\Access\Response|bool
+     */
+    public function create(User $user)
+    {
+        return true;
+    }
+
+    /**
+     * Determine whether the user can update the model.
+     *
+     * @param  \App\Models\User  $user
+     * @param  \App\Models\BitcoinEvent  $bitcoinEvent
+     *
+     * @return \Illuminate\Auth\Access\Response|bool
+     */
+    public function update(User $user, BitcoinEvent $bitcoinEvent)
+    {
+        return $bitcoinEvent->created_by === $user->id;
+    }
+
+    /**
+     * Determine whether the user can delete the model.
+     *
+     * @param  \App\Models\User  $user
+     * @param  \App\Models\BitcoinEvent  $bitcoinEvent
+     *
+     * @return \Illuminate\Auth\Access\Response|bool
+     */
+    public function delete(User $user, BitcoinEvent $bitcoinEvent)
+    {
+        //
+    }
+
+    /**
+     * Determine whether the user can restore the model.
+     *
+     * @param  \App\Models\User  $user
+     * @param  \App\Models\BitcoinEvent  $bitcoinEvent
+     *
+     * @return \Illuminate\Auth\Access\Response|bool
+     */
+    public function restore(User $user, BitcoinEvent $bitcoinEvent)
+    {
+        //
+    }
+
+    /**
+     * Determine whether the user can permanently delete the model.
+     *
+     * @param  \App\Models\User  $user
+     * @param  \App\Models\BitcoinEvent  $bitcoinEvent
+     *
+     * @return \Illuminate\Auth\Access\Response|bool
+     */
+    public function forceDelete(User $user, BitcoinEvent $bitcoinEvent)
+    {
+        //
+    }
+}
diff --git a/app/Policies/CityPolicy.php b/app/Policies/CityPolicy.php
index dff11f0d..467684ea 100644
--- a/app/Policies/CityPolicy.php
+++ b/app/Policies/CityPolicy.php
@@ -53,7 +53,7 @@ class CityPolicy extends BasePolicy
      */
     public function update(User $user, City $city)
     {
-        return $user->is_lecturer;
+        return $city->created_by === $user->id;
     }
 
     /**
diff --git a/app/Policies/LecturerPolicy.php b/app/Policies/LecturerPolicy.php
index 028b6d06..8ca0ea11 100644
--- a/app/Policies/LecturerPolicy.php
+++ b/app/Policies/LecturerPolicy.php
@@ -57,7 +57,7 @@ class LecturerPolicy extends BasePolicy
      */
     public function update(User $user, Lecturer $lecturer)
     {
-        return $user->belongsToTeam($lecturer->team);
+        return $lecturer->created_by === $user->id;
     }
 
     /**
diff --git a/app/Policies/LibraryItemPolicy.php b/app/Policies/LibraryItemPolicy.php
index e3a2f64e..3470eae2 100644
--- a/app/Policies/LibraryItemPolicy.php
+++ b/app/Policies/LibraryItemPolicy.php
@@ -53,7 +53,7 @@ class LibraryItemPolicy extends BasePolicy
      */
     public function update(User $user, LibraryItem $libraryItem)
     {
-        return false;
+        return $libraryItem->created_by === $user->id;
     }
 
     /**
diff --git a/app/Policies/LibraryPolicy.php b/app/Policies/LibraryPolicy.php
index ffbfc3cd..9966985e 100644
--- a/app/Policies/LibraryPolicy.php
+++ b/app/Policies/LibraryPolicy.php
@@ -53,7 +53,7 @@ class LibraryPolicy extends BasePolicy
      */
     public function update(User $user, Library $library)
     {
-        return false;
+        return $library->created_by === $user->id;
     }
 
     /**
diff --git a/app/Policies/MeetupEventPolicy.php b/app/Policies/MeetupEventPolicy.php
index 6f9d7ef6..ac828ca5 100644
--- a/app/Policies/MeetupEventPolicy.php
+++ b/app/Policies/MeetupEventPolicy.php
@@ -53,7 +53,7 @@ class MeetupEventPolicy extends BasePolicy
      */
     public function update(User $user, MeetupEvent $meetupEvent)
     {
-        return false;
+        return $meetupEvent->created_by === $user->id;
     }
 
     /**
diff --git a/app/Policies/MeetupPolicy.php b/app/Policies/MeetupPolicy.php
index a50b81f2..ebed96b8 100644
--- a/app/Policies/MeetupPolicy.php
+++ b/app/Policies/MeetupPolicy.php
@@ -57,7 +57,7 @@ class MeetupPolicy extends BasePolicy
      */
     public function update(User $user, Meetup $meetup)
     {
-        return false;
+        return $meetup->created_by === $user->id;
     }
 
     /**
diff --git a/app/Policies/OrangePillPolicy.php b/app/Policies/OrangePillPolicy.php
index eede9e26..03763bdf 100644
--- a/app/Policies/OrangePillPolicy.php
+++ b/app/Policies/OrangePillPolicy.php
@@ -14,6 +14,7 @@ class OrangePillPolicy extends BasePolicy
      * Determine whether the user can view any models.
      *
      * @param  \App\Models\User  $user
+     *
      * @return \Illuminate\Auth\Access\Response|bool
      */
     public function viewAny(User $user)
@@ -26,6 +27,7 @@ class OrangePillPolicy extends BasePolicy
      *
      * @param  \App\Models\User  $user
      * @param  \App\Models\OrangePill  $orangePill
+     *
      * @return \Illuminate\Auth\Access\Response|bool
      */
     public function view(User $user, OrangePill $orangePill)
@@ -37,6 +39,7 @@ class OrangePillPolicy extends BasePolicy
      * Determine whether the user can create models.
      *
      * @param  \App\Models\User  $user
+     *
      * @return \Illuminate\Auth\Access\Response|bool
      */
     public function create(User $user)
@@ -49,11 +52,12 @@ class OrangePillPolicy extends BasePolicy
      *
      * @param  \App\Models\User  $user
      * @param  \App\Models\OrangePill  $orangePill
+     *
      * @return \Illuminate\Auth\Access\Response|bool
      */
     public function update(User $user, OrangePill $orangePill)
     {
-        return false;
+        return $orangePill->user_id === $user->id;
     }
 
     /**
@@ -61,6 +65,7 @@ class OrangePillPolicy extends BasePolicy
      *
      * @param  \App\Models\User  $user
      * @param  \App\Models\OrangePill  $orangePill
+     *
      * @return \Illuminate\Auth\Access\Response|bool
      */
     public function delete(User $user, OrangePill $orangePill)
@@ -73,6 +78,7 @@ class OrangePillPolicy extends BasePolicy
      *
      * @param  \App\Models\User  $user
      * @param  \App\Models\OrangePill  $orangePill
+     *
      * @return \Illuminate\Auth\Access\Response|bool
      */
     public function restore(User $user, OrangePill $orangePill)
@@ -85,6 +91,7 @@ class OrangePillPolicy extends BasePolicy
      *
      * @param  \App\Models\User  $user
      * @param  \App\Models\OrangePill  $orangePill
+     *
      * @return \Illuminate\Auth\Access\Response|bool
      */
     public function forceDelete(User $user, OrangePill $orangePill)
diff --git a/app/Policies/VenuePolicy.php b/app/Policies/VenuePolicy.php
index 3818191e..71a3ac13 100644
--- a/app/Policies/VenuePolicy.php
+++ b/app/Policies/VenuePolicy.php
@@ -57,8 +57,7 @@ class VenuePolicy extends BasePolicy
      */
     public function update(User $user, Venue $venue)
     {
-        return $venue->lecturers->where('team_id', $user->current_team_id)
-                                ->isNotEmpty();
+        return $venue->created_by === $user->id;
     }
 
     /**
diff --git a/composer.lock b/composer.lock
index c2773afa..aaa520c6 100644
--- a/composer.lock
+++ b/composer.lock
@@ -13011,16 +13011,16 @@
         },
         {
             "name": "laravel-lang/lang",
-            "version": "12.7.0",
+            "version": "12.7.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/Laravel-Lang/lang.git",
-                "reference": "d900bc6dc001a8ca63cc13184c0720d4262e0d23"
+                "reference": "839ce5d81cd4a8deda5c09bb74af995371345c5b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Laravel-Lang/lang/zipball/d900bc6dc001a8ca63cc13184c0720d4262e0d23",
-                "reference": "d900bc6dc001a8ca63cc13184c0720d4262e0d23",
+                "url": "https://api.github.com/repos/Laravel-Lang/lang/zipball/839ce5d81cd4a8deda5c09bb74af995371345c5b",
+                "reference": "839ce5d81cd4a8deda5c09bb74af995371345c5b",
                 "shasum": ""
             },
             "require": {
@@ -13082,7 +13082,7 @@
                     "type": "open_collective"
                 }
             ],
-            "time": "2022-12-14T07:53:56+00:00"
+            "time": "2022-12-14T13:47:21+00:00"
         },
         {
             "name": "laravel-lang/publisher",
@@ -13820,16 +13820,16 @@
         },
         {
             "name": "phpunit/php-code-coverage",
-            "version": "9.2.20",
+            "version": "9.2.21",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
-                "reference": "af7463c955007de36db0c5e26d03e2f933c2e980"
+                "reference": "3f893e19712bb0c8bc86665d1562e9fd509c4ef0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/af7463c955007de36db0c5e26d03e2f933c2e980",
-                "reference": "af7463c955007de36db0c5e26d03e2f933c2e980",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/3f893e19712bb0c8bc86665d1562e9fd509c4ef0",
+                "reference": "3f893e19712bb0c8bc86665d1562e9fd509c4ef0",
                 "shasum": ""
             },
             "require": {
@@ -13885,7 +13885,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/php-code-coverage/issues",
-                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/9.2.20"
+                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/9.2.21"
             },
             "funding": [
                 {
@@ -13893,7 +13893,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2022-12-13T07:49:28+00:00"
+            "time": "2022-12-14T13:26:54+00:00"
         },
         {
             "name": "phpunit/php-file-iterator",
diff --git a/config/app.php b/config/app.php
index 89982966..ae0c0526 100644
--- a/config/app.php
+++ b/config/app.php
@@ -4,6 +4,8 @@ use Illuminate\Support\Facades\Facade;
 
 return [
 
+    'super-admin' => env('SUPERADMIN', false),
+
     /*
     |--------------------------------------------------------------------------
     | Application Name
diff --git a/database/migrations/2022_12_14_123437_create_created_by_fields_on_all_tables.php b/database/migrations/2022_12_14_123437_create_created_by_fields_on_all_tables.php
new file mode 100644
index 00000000..4884a938
--- /dev/null
+++ b/database/migrations/2022_12_14_123437_create_created_by_fields_on_all_tables.php
@@ -0,0 +1,117 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    /**
+     * Run the migrations.
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('cities', function (Blueprint $table) {
+            $table->foreignId('created_by')
+                  ->default(1)
+                  ->constrained('users')
+                  ->cascadeOnDelete()
+                  ->cascadeOnUpdate();
+        });
+        Schema::table('venues', function (Blueprint $table) {
+            $table->foreignId('created_by')
+                  ->default(1)
+                  ->constrained('users')
+                  ->cascadeOnDelete()
+                  ->cascadeOnUpdate();
+        });
+        Schema::table('lecturers', function (Blueprint $table) {
+            $table->foreignId('created_by')
+                  ->default(1)
+                  ->constrained('users')
+                  ->cascadeOnDelete()
+                  ->cascadeOnUpdate();
+        });
+        Schema::table('meetups', function (Blueprint $table) {
+            $table->foreignId('created_by')
+                  ->default(1)
+                  ->constrained('users')
+                  ->cascadeOnDelete()
+                  ->cascadeOnUpdate();
+        });
+        Schema::table('meetup_events', function (Blueprint $table) {
+            $table->foreignId('created_by')
+                  ->default(1)
+                  ->constrained('users')
+                  ->cascadeOnDelete()
+                  ->cascadeOnUpdate();
+        });
+        Schema::table('bitcoin_events', function (Blueprint $table) {
+            $table->foreignId('created_by')
+                  ->default(1)
+                  ->constrained('users')
+                  ->cascadeOnDelete()
+                  ->cascadeOnUpdate();
+        });
+        Schema::table('courses', function (Blueprint $table) {
+            $table->foreignId('created_by')
+                  ->default(1)
+                  ->constrained('users')
+                  ->cascadeOnDelete()
+                  ->cascadeOnUpdate();
+        });
+        Schema::table('course_events', function (Blueprint $table) {
+            $table->foreignId('created_by')
+                  ->default(1)
+                  ->constrained('users')
+                  ->cascadeOnDelete()
+                  ->cascadeOnUpdate();
+        });
+        Schema::table('libraries', function (Blueprint $table) {
+            $table->foreignId('created_by')
+                  ->default(1)
+                  ->constrained('users')
+                  ->cascadeOnDelete()
+                  ->cascadeOnUpdate();
+        });
+        Schema::table('library_items', function (Blueprint $table) {
+            $table->foreignId('created_by')
+                  ->default(1)
+                  ->constrained('users')
+                  ->cascadeOnDelete()
+                  ->cascadeOnUpdate();
+        });
+        Schema::table('podcasts', function (Blueprint $table) {
+            $table->foreignId('created_by')
+                  ->default(1)
+                  ->constrained('users')
+                  ->cascadeOnDelete()
+                  ->cascadeOnUpdate();
+        });
+        Schema::table('episodes', function (Blueprint $table) {
+            $table->foreignId('created_by')
+                  ->default(1)
+                  ->constrained('users')
+                  ->cascadeOnDelete()
+                  ->cascadeOnUpdate();
+        });
+        Schema::table('book_cases', function (Blueprint $table) {
+            $table->foreignId('created_by')
+                  ->default(1)
+                  ->constrained('users')
+                  ->cascadeOnDelete()
+                  ->cascadeOnUpdate();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('cities', function (Blueprint $table) {
+            //
+        });
+    }
+};
diff --git a/database/seeders/DatabaseSeeder.php b/database/seeders/DatabaseSeeder.php
index be6ae86e..021018d2 100644
--- a/database/seeders/DatabaseSeeder.php
+++ b/database/seeders/DatabaseSeeder.php
@@ -81,70 +81,83 @@ class DatabaseSeeder extends Seeder
             'name'       => 'Füssen',
             'latitude'   => 47.57143,
             'longitude'  => 10.70171,
+            'created_by'  => 1,
         ]);
         City::create([
             'country_id' => 1,
             'name'       => 'Kempten',
             'latitude'   => 47.728569,
             'longitude'  => 10.315784,
+            'created_by'  => 1,
         ]);
         City::create([
             'country_id' => 1,
             'name'       => 'Pfronten',
             'latitude'   => 47.582359,
             'longitude'  => 10.5598,
+            'created_by'  => 1,
         ]);
         City::create([
             'country_id' => 2,
             'name'       => 'Wien',
             'latitude'   => 48.20835,
             'longitude'  => 16.37250,
+            'created_by'  => 1,
         ]);
         City::create([
             'country_id' => 3,
             'name'       => 'Zürich',
             'latitude'   => 47.41330,
             'longitude'  => 8.65639,
+            'created_by'  => 1,
         ]);
         Venue::create([
             'city_id' => 1,
             'name'    => 'The Blue Studio Coworking (Füssen)',
             'street'  => 'Teststraße 1',
+            'created_by'  => 1,
         ]);
         Venue::create([
             'city_id' => 2,
             'name'    => 'The Blue Studio Coworking (Kempten)',
             'street'  => 'Teststraße 2',
+            'created_by'  => 1,
         ]);
         Venue::create([
             'city_id' => 3,
             'name'    => 'The Blue Studio Coworking (Pfronten)',
             'street'  => 'Teststraße 3',
+            'created_by'  => 1,
         ]);
         Venue::create([
             'city_id' => 4,
             'name'    => 'Innsbruck',
             'street'  => 'Innsbrucker Straße 1',
+            'created_by'  => 1,
         ]);
         Lecturer::create([
             'team_id' => 1,
             'name'    => 'Markus Turm',
             'active'  => true,
+            'created_by'  => 1,
         ]);
         Lecturer::create([
             'team_id' => 1,
             'name'    => 'Beppo',
             'active'  => true,
+            'created_by'  => 1,
         ]);
         Lecturer::create([
             'team_id' => 1,
             'name'    => 'Helper',
             'active'  => true,
+            'created_by'  => 1,
         ]);
         Lecturer::create([
             'team_id' => 1,
             'name'    => 'Gigi',
             'active'  => true,
+            'created_by'  => 1,
         ]);
         $category = Category::create([
             'name' => 'Präsenzunterricht',
@@ -157,6 +170,7 @@ class DatabaseSeeder extends Seeder
         $course = Course::create([
             'lecturer_id' => 1,
             'name'        => 'Hands on Bitcoin',
+            'created_by'  => 1,
         ]);
         $course->syncTagsWithType(['Hardware Wallet'], 'course');
         $course->categories()
@@ -164,6 +178,7 @@ class DatabaseSeeder extends Seeder
         $course = Course::create([
             'lecturer_id' => 1,
             'name'        => 'Bitcoin <> Crypto',
+            'created_by'  => 1,
         ]);
         $course->syncTagsWithType(['Lightning'], 'course');
         $course->categories()
@@ -171,6 +186,7 @@ class DatabaseSeeder extends Seeder
         $course = Course::create([
             'lecturer_id' => 2,
             'name'        => 'Bitcoin Lightning Network',
+            'created_by'  => 1,
         ]);
         $course->syncTagsWithType(['Für Unternehmen'], 'course');
         $course->categories()
@@ -190,6 +206,7 @@ class DatabaseSeeder extends Seeder
                 ->addDays(14)
                 ->startOfDay()
                 ->addHour(),
+            'created_by'  => 1,
         ]);
         CourseEvent::create([
             'course_id' => 1,
@@ -202,6 +219,7 @@ class DatabaseSeeder extends Seeder
                 ->addDays(3)
                 ->startOfDay()
                 ->addHour(),
+            'created_by'  => 1,
         ]);
         CourseEvent::create([
             'course_id' => 1,
@@ -214,6 +232,7 @@ class DatabaseSeeder extends Seeder
                 ->addDays(4)
                 ->startOfDay()
                 ->addHour(),
+            'created_by'  => 1,
         ]);
         CourseEvent::create([
             'course_id' => 3,
@@ -226,6 +245,7 @@ class DatabaseSeeder extends Seeder
                 ->addDays(4)
                 ->startOfDay()
                 ->addHour(),
+            'created_by'  => 1,
         ]);
         Registration::create([
             'course_event_id' => 1,
@@ -234,6 +254,7 @@ class DatabaseSeeder extends Seeder
         $library = Library::create([
             'name'           => 'Einundzwanzig',
             'language_codes' => ['de'],
+            'created_by'  => 1,
         ]);
         $libraryItem = LibraryItem::create([
             'lecturer_id'   => 3,
@@ -241,6 +262,7 @@ class DatabaseSeeder extends Seeder
             'type'          => 'youtube_video',
             'language_code' => 'de',
             'value'         => 'https://www.youtube.com/watch?v=Oztd2Sja4k0',
+            'created_by'  => 1,
         ]);
         $libraryItem->syncTagsWithType(['Bitcoin'], 'library_item');
         $library->libraryItems()
@@ -248,6 +270,7 @@ class DatabaseSeeder extends Seeder
         $library = Library::create([
             'name'           => 'Apricot',
             'language_codes' => ['de', 'en'],
+            'created_by'  => 1,
         ]);
         $libraryItem = LibraryItem::create([
             'lecturer_id'   => 4,
@@ -255,6 +278,7 @@ class DatabaseSeeder extends Seeder
             'type'          => 'blog_article',
             'language_code' => 'de',
             'value'         => 'https://aprycot.media/blog/liebe-krypto-und-fiat-bros/',
+            'created_by'  => 1,
         ]);
         $libraryItem->syncTagsWithType(['Bitcoin'], 'library_item');
         $library->libraryItems()
@@ -262,6 +286,7 @@ class DatabaseSeeder extends Seeder
         $library = Library::create([
             'name'           => 'Gigi',
             'language_codes' => ['de', 'en'],
+            'created_by'  => 1,
         ]);
         $libraryItem = LibraryItem::create([
             'lecturer_id'   => 4,
@@ -269,6 +294,7 @@ class DatabaseSeeder extends Seeder
             'type'          => 'youtube_video',
             'language_code' => 'de',
             'value'         => 'https://www.youtube.com/watch?v=C7ynm0Zkwfk',
+            'created_by'  => 1,
         ]);
         $libraryItem->syncTagsWithType(['Proof of Work'], 'library_item');
         $library->libraryItems()
@@ -277,6 +303,7 @@ class DatabaseSeeder extends Seeder
             'name'           => 'Einundzwanzig Dozenten',
             'is_public'      => false,
             'language_codes' => ['de', 'en'],
+            'created_by'  => 1,
         ]);
         $libraryItem = LibraryItem::create([
             'lecturer_id'   => 4,
@@ -284,6 +311,7 @@ class DatabaseSeeder extends Seeder
             'type'          => 'downloadable_file',
             'language_code' => 'de',
             'value'         => null,
+            'created_by'  => 1,
         ]);
         $libraryItem->syncTagsWithType(['Präsentationen'], 'library_item');
         $nonPublicLibrary->libraryItems()
@@ -294,6 +322,7 @@ class DatabaseSeeder extends Seeder
             'city_id' => 1,
             'name'    => 'Einundzwanzig Kempten',
             'link'    => 'https://t.me/EinundzwanzigKempten',
+            'created_by'  => 1,
         ]);
         MeetupEvent::create([
             'meetup_id'   => 1,
@@ -304,6 +333,7 @@ class DatabaseSeeder extends Seeder
             'location'    => 'Einundzwanzig Kempten',
             'description' => fake()->text(),
             'link'        => 'https://t.me/EinundzwanzigKempten',
+            'created_by'  => 1,
         ]);
         BitcoinEvent::create([
             'venue_id'    => 4,
@@ -321,6 +351,7 @@ Advance ticket sales begin on December 21, 2022 at 9:21 p.m. with time-limited e
 Ticket presale begins on December 21, 2022 at 9:21 p.m. Be quick - there are a limited amount of early bird tickets again.
 ',
             'link'        => 'https://bconf.de/en/',
+            'created_by'  => 1,
         ]);
     }
 }
diff --git a/draft.yaml b/draft.yaml
index e69de29b..0d6e5034 100644
--- a/draft.yaml
+++ b/draft.yaml
@@ -0,0 +1,4 @@
+models:
+  Item:
+    name: string:unique
+    link: string