Fix #44 check for empty values instead of null values

src/User/Model/User.php

@@ -185,6 +185,7 @@ class User extends ActiveRecord implements IdentityInterface
             'emailTrim' => ['email', 'trim'],
 
             // password rules
+            'passwordTrim' => ['password', 'trim'],
             'passwordRequired' => ['password', 'required', 'on' => ['register']],
             'passwordLength' => ['password', 'string', 'min' => 6, 'max' => 72, 'on' => ['register', 'create']],
         ];

src/User/Service/UserCreateService.php

@@ -49,7 +49,7 @@ class UserCreateService implements ServiceInterface
 
         try {
             $model->confirmed_at = time();
-            $model->password = $model->password !== null
+            $model->password = !empty($model->password)
                 ? $model->password
                 : $this->securityHelper->generatePassword(8);