API works for multi-account piggies, the rest throws an exception

app/User.php

@@ -332,14 +332,6 @@ class User extends Authenticatable
         return $this->hasMany(ObjectGroup::class);
     }
 
-    /**
-     * Link to piggy banks.
-     */
-    public function piggyBanks(): HasManyThrough
-    {
-        return $this->hasManyThrough(PiggyBank::class, Account::class);
-    }
-
     /**
      * Link to preferences.
      */