add

server/routes/api.php

@@ -51,7 +51,7 @@ $api->version('v1', ['namespace' => 'App\Http\Controllers\Api\V1'], function ($a
         'as' => 'auth.login',
         'uses' => 'AuthController@login',
     ]);
-    $api->post('auth/logout', [
+    $api->get('auth/logout', [
         'as' => 'auth.logout',
         'uses' => 'AuthController@logout',
     ]);