chore: code cleanup.

app/Models/Bill.php

@@ -166,14 +166,6 @@ class Bill extends Model
         throw new NotFoundHttpException();
     }
 
-    /**
-     * @return BelongsTo
-     */
-    public function user(): BelongsTo
-    {
-        return $this->belongsTo(User::class);
-    }
-
     /**
      * @return MorphMany
      */
@@ -233,6 +225,14 @@ class Bill extends Model
         return $this->hasMany(TransactionJournal::class);
     }
 
+    /**
+     * @return BelongsTo
+     */
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+
     /**
      * Get the max amount
      *