add attributeName function

app/Models/User.php

@@ -121,6 +121,13 @@ class User extends Authenticatable
         return $this->type === self::TYPE_COORDINATOR;
     }
 
+    /**
+     * @return string
+     */
+    public function attributeName(string $attribute) {
+        return $this->getTable() . '-' . $attribute;
+    }
+
     /**
      * @return string
      */