fix: Fix display name of new users

When a user is created the display name was cached based on the account
data. However, the account data does not provide a display name, so when
the user was added to a circle only the user id was shown. Now the
display name is got from the "IUser" API instead.

"SyncService::syncNextcloudUser" just calls
"FederatedUserService::getLocalFederatedUser" with a parameter that
causes the display name to be got from the account data, so the call to
"syncNextcloudUser" is just replaced with a direct call to
"getLocalFederatedUser" with the default parameters, which cause the
display name to be got from the "IUser" API.

Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>

lib/Listeners/UserCreated.php

@@ -12,7 +12,7 @@
 namespace OCA\Circles\Listeners;
 
 use Exception;
-use OCA\Circles\Service\SyncService;
+use OCA\Circles\Service\FederatedUserService;
 use OCP\EventDispatcher\Event;
 use OCP\EventDispatcher\IEventListener;
 use OCP\User\Events\UserCreatedEvent;
@@ -29,7 +29,7 @@ class UserCreated implements IEventListener {
 	 * @param SyncService $syncService
 	 */
 	public function __construct(SyncService $syncService) {
-		$this->syncService = $syncService;
+		$this->federatedUserService = $federatedUserService;
 	}
 
 
@@ -44,7 +44,7 @@ public function handle(Event $event): void {
 		$user = $event->getUser();
 
 		try {
-			$this->syncService->syncNextcloudUser($user->getUID());
+			$this->federatedUserService->getLocalFederatedUser($user->getUID());
 		} catch (Exception $e) {
 		}
 	}