alevor657 / alvo-comment

                    "validation" => [

                        "custom_test" => [

                            "message" => "User with this email is already registered",

                            "test" => function ($email) {

                                $user = new User();

                                $user->setDb($this->di->get("db"));

                                $check = $user->find('email', $email);

                                return !$check;

                            }

                        ],

                        "not_empty"

                    ]

    public function loadUserData($id)

    {

        $user = new User();

        $user->setDb($this->di->get("db"));

        $user->find("id", $id);

        return $user;

    }