add user-questionnaire, response, question, answers to api

frontend/config/main.php

@@ -38,16 +38,28 @@ return [
     ],
 
     'components' => [
+        'response' => [
+            'formatters' => [
+                'json' => [
+                    'class' => 'yii\web\JsonResponseFormatter',
+                    'prettyPrint' => YII_DEBUG,
+                    'encodeOptions' => JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE,
+                ],
+            ],
+        ],
+
         'request' => [
             'csrfParam' => '_csrf-frontend',
             'baseUrl' => '',
             'parsers' => [
                 'application/json' => 'yii\web\JsonParser',
+                'application/xml' => 'yii\web\XmlParser',
             ],
         ],
         'user' => [
             'identityClass' => 'common\models\User',
             'enableAutoLogin' => true,
+
             'identityCookie' => ['name' => '_identity-frontend', 'httpOnly' => true],
         ],
         'session' => [
@@ -66,7 +78,6 @@ return [
         'errorHandler' => [
             'errorAction' => 'site/error',
         ],
-
         'urlManager' => [
             'enablePrettyUrl' => true,
             'showScriptName' => false,