GET mastertasks, GET mastertasks/{id} endpointy

be/app/Models/SubTask.php

@@ -13,12 +13,12 @@ class SubTask extends Model
 
     public function mastertask()
     {
-        return $this->belongsTo(MasterTask::class);
+        return $this->belongsTo(MasterTask::class, 'master_task_id');
     }
 
     public function user()
     {
-        return $this->belongsTo(MasterTask::class);
+        return $this->belongsTo(User::class);
     }
 
     public function timeblocks()