diff --git a/core/modules/rest/src/Plugin/ResourceBase.php b/core/modules/rest/src/Plugin/ResourceBase.php
index 0babfb7..9aeec30 100644
--- a/core/modules/rest/src/Plugin/ResourceBase.php
+++ b/core/modules/rest/src/Plugin/ResourceBase.php
@@ -221,7 +221,7 @@ protected function getBaseRoute($canonical_path, $method) {
    *
    * @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException
    */
-  protected function restFloodControl($config, $event) {
+  protected function restFloodControl($config, $name) {
     $limit = $config->get('user_limit');
     $interval = $config->get('user_window');
     if (!\Drupal::flood()->isAllowed($name, $limit, $interval)) {
diff --git a/core/modules/rest/src/Plugin/rest/resource/UserLoginResource.php b/core/modules/rest/src/Plugin/rest/resource/UserLoginResource.php
index 966897e..7a70ffd 100644
--- a/core/modules/rest/src/Plugin/rest/resource/UserLoginResource.php
+++ b/core/modules/rest/src/Plugin/rest/resource/UserLoginResource.php
@@ -38,7 +38,7 @@ public function post(array $operation = array()) {
         if (!empty($operation['credentials'])) {
           return $this->login($operation['credentials']);
         }
-        return new ResourceResponse('Missing name and pass.', 400, array());
+        return new ResourceResponse('credentials.', 400, array());
 
       case 'logout':
         return $this->logout();
@@ -58,11 +58,11 @@ public function post(array $operation = array()) {
   protected function login(array $credentials = array()) {
     // Verify that the username is filled.
     if (!array_key_exists('name', $credentials)) {
-      return new ResourceResponse('Missing username.', 400, array());
+      return new ResourceResponse('Missing credentials.name.', 400, array());
     }
     // Verify that the username is filled.
     if (!array_key_exists('pass', $credentials)) {
-      return new ResourceResponse('Missing pass.', 400, array());
+      return new ResourceResponse('Missing credentials.pass.', 400, array());
     }
 
     // Flood control.
@@ -90,4 +90,4 @@ protected function logout() {
     return new ResourceResponse('Logged out!', 200, array());
   }
 
-}
\ No newline at end of file
+}