update import logic for the new export logic

apps/files_external/command/import.php

@@ -194,8 +194,8 @@ class Import extends Base {
 		$mount = new StorageConfig($data['mount_id']);
 		$mount->setMountPoint($data['mount_point']);
 		$mount->setBackend($this->getBackendByClass($data['storage']));
-		$authBackends = $this->backendService->getAuthMechanismsByScheme([$data['authentication_type']]);
-		$mount->setAuthMechanism(current($authBackends));
+		$authBackend = $this->backendService->getAuthMechanism($data['authentication_type']);
+		$mount->setAuthMechanism($authBackend);
 		$mount->setBackendOptions($data['configuration']);
 		$mount->setMountOptions($data['options']);
 		$mount->setApplicableUsers(isset($data['applicable_users']) ? $data['applicable_users'] : []);