add scrutinizer suggestion

src/User/Form/SettingsForm.php

@@ -122,6 +122,7 @@ class SettingsForm extends Model
     {
         if ($this->validate()) {
             $user = $this->getUser();
+            if ($user instanceof User) {
                 $user->scenario = 'settings';
                 $user->username = $this->username;
                 $user->password = $this->new_password;
@@ -138,6 +139,7 @@ class SettingsForm extends Model
 
                 return $user->save();
             }
+        }
 
         return false;
     }