public function actionSignup()
{
$signup = new SignupForm(['scenario' => 'signup']);
$user = new User();
$signup->email = Yii::$app->request->post('email');
$signup->password = Yii::$app->request->post('password');
$signup->display_name = Yii::$app->request->post('display_name');
if ($user = $signup->signup()) {
$user->role = User::ROLE_USER;
$user->save();
return json_encode(['success' => true, 'data' => $user->attributes]);
} else {
if ($signup->hasErrors()) {
return json_encode(['success' => false, 'data' => $signup->getErrors()]);
}
}
}