diff --git a/lib/private/AppFramework/Bootstrap/RegistrationContext.php b/lib/private/AppFramework/Bootstrap/RegistrationContext.php
index 0f408380e8824..2566e742407e8 100644
--- a/lib/private/AppFramework/Bootstrap/RegistrationContext.php
+++ b/lib/private/AppFramework/Bootstrap/RegistrationContext.php
@@ -72,6 +72,9 @@ class RegistrationContext {
 	/** @var array[] */
 	private $initialStates = [];
 
+	/** @var array[] */
+	private $userBackEnds = [];
+
 	/** @var ILogger */
 	private $logger;
 
@@ -174,6 +177,13 @@ public function registerInitialStateProvider(string $class): void {
 					$class
 				);
 			}
+
+			public function registerUserBackend(string $class): void {
+				$this->context->registerUserBackend(
+					$this->appId,
+					$class
+				);
+			}
 		};
 	}
 
@@ -260,6 +270,13 @@ public function registerInitialState(string $appId, string $class): void {
 		];
 	}
 
+	public function registerUserBackEnd(string $appId, string $class): void {
+		$this->userBackEnds[] = [
+			'appId' => $appId,
+			'class' => $class,
+		];
+	}
+
 	/**
 	 * @param App[] $apps
 	 */
diff --git a/lib/public/AppFramework/Bootstrap/IRegistrationContext.php b/lib/public/AppFramework/Bootstrap/IRegistrationContext.php
index 13181cbe1cb5b..ddf311b0d7622 100644
--- a/lib/public/AppFramework/Bootstrap/IRegistrationContext.php
+++ b/lib/public/AppFramework/Bootstrap/IRegistrationContext.php
@@ -168,4 +168,16 @@ public function registerAlternativeLogin(string $class): void;
 	 * @since 21.0.0
 	 */
 	public function registerInitialStateProvider(string $class): void;
+
+	/**
+	 * Register a user backend
+	 *
+	 * @param string $class the class name of an \OCP\IUserBackend implementation
+	 * @psalm-param class-string<\OCP\IUserBackend> $class the class name of an \OCP\IUserBackend implementation
+	 *
+	 * @return void
+	 *
+	 * @since 21.0.0
+	 */
+	public function registerUserBackend(string $class): void;
 }