diff -u b/core/modules/rest/rest.install b/core/modules/rest/rest.install
--- b/core/modules/rest/rest.install
+++ b/core/modules/rest/rest.install
@@ -92,19 +92,30 @@
 }
 
 /**
+ * @} End of "defgroup updates-8.1.x-to-8.2.x".
+ */
+
+/**
+ * @defgroup updates-8.3.x-to-8.4.x Updates from 8.3.x to 8.4.x
+ * @{
+ * Update functions from 8.3.x to 8.4.x.
+ */
+
+/**
  * Ensure the right REST authentication method is used.
  *
  * This fixes the bug in https://www.drupal.org/node/2825204.
  */
-function rest_update_8204() {
+function rest_update_8401() {
   $config_factory = \Drupal::configFactory();
-  $process_auth = function ($auth_option) {
-    switch ($auth_option) {
-      case 'user':
-        return 'cookie';
+  $auth_providers = \Drupal::service('authentication_collector')->getSortedProviders();
+  $process_auth = function ($auth_option) use ($auth_providers) {
+    foreach ($auth_providers as $provider_id => $provider_data) {
+      // The provider belongs to the module that declares it as a service.
+      if (strtok($provider_data->_serviceId, '.') === $auth_option) {
+        return $provider_id;
+      }
     }
-
-    return $auth_option;
   };
 
   foreach ($config_factory->listAll('views.view.') as $view_config_name) {
@@ -127,3 +138,3 @@
 /**
- * @} End of "defgroup updates-8.1.x-to-8.2.x".
+ * @} End of "defgroup updates-8.3.x-to-8.4.x".
  */