Created middleware to catch rest errors and return JSON responses

module/Rest/config/middleware-pipeline.config.php

@@ -12,5 +12,14 @@ return [
             ],
             'priority' => 5,
         ],
+
+        'rest-error' => [
+            'path' => '/rest',
+            'middleware' => [
+                Middleware\Error\ResponseTypeMiddleware::class,
+            ],
+            'error'    => true,
+            'priority' => -10000,
+        ],
     ],
 ];

module/Rest/config/services.config.php

@@ -19,6 +19,8 @@ return [
 
             Middleware\CrossDomainMiddleware::class => InvokableFactory::class,
             Middleware\CheckAuthenticationMiddleware::class => AnnotatedFactory::class,
+
+            Middleware\Error\ResponseTypeMiddleware::class => AnnotatedFactory::class,
         ],
     ],