feat: add method to return auth password name in User model test

This is required to be compatible with the rehashing password feature here laravel/framework#48665

tests/Models/User.php

@@ -28,6 +28,11 @@ public function getAuthIdentifier()
         return $this->attributes[$name];
     }
 
+    public function getAuthPasswordName()
+    {
+        return 'password';
+    }
+
     public function getAuthPassword()
     {
         return $this->attributes['password'];