diff --git a/lib/Controller/AccountController.php b/lib/Controller/AccountController.php
index 150dd0229d..ca3b39c57e 100644
--- a/lib/Controller/AccountController.php
+++ b/lib/Controller/AccountController.php
@@ -30,7 +30,7 @@
 use OCP\AppFramework\Http\Attribute\PublicPage;
 use OCP\AppFramework\Http\Attribute\UseSession;
 use OCP\AppFramework\Http\DataResponse;
-use OCP\IConfig;
+use OCP\Config\IUserConfig;
 use OCP\IL10N;
 use OCP\IRequest;
 use OCP\IURLGenerator;
@@ -58,7 +58,7 @@ public function __construct(
 		protected IUserSession $userSession,
 		protected SessionService $sessionService,
 		private ValidateHelper $validateHelper,
-		private IConfig $config,
+		private IUserConfig $userConfig,
 	) {
 		parent::__construct(Application::APP_ID, $request);
 	}
@@ -419,7 +419,7 @@ public function setConfig(string $key): DataResponse {
 				$value = json_encode($value);
 			}
 
-			$this->config->setUserValue($user->getUID(), Application::APP_ID, $key, $value);
+			$this->userConfig->setValueString($user->getUID(), Application::APP_ID, $key, $value);
 
 			return new DataResponse([
 				'key' => $key,
diff --git a/lib/Migration/Version12000Date20250517134200.php b/lib/Migration/Version12000Date20250517134200.php
index 97a4f8aacc..1a8ccd047c 100644
--- a/lib/Migration/Version12000Date20250517134200.php
+++ b/lib/Migration/Version12000Date20250517134200.php
@@ -12,13 +12,13 @@
 use Closure;
 use OCA\Libresign\AppInfo\Application;
 use OCP\DB\ISchemaWrapper;
-use OCP\IConfig;
+use OCP\IAppConfig;
 use OCP\Migration\IOutput;
 use OCP\Migration\SimpleMigrationStep;
 
 class Version12000Date20250517134200 extends SimpleMigrationStep {
 	public function __construct(
-		protected IConfig $config,
+		protected IAppConfig $appConfig,
 	) {
 	}
 
@@ -29,11 +29,11 @@ public function __construct(
 	 */
 	#[\Override]
 	public function preSchemaChange(IOutput $output, Closure $schemaClosure, array $options): void {
-		$keys = $this->config->getAppKeys(Application::APP_ID);
+		$keys = $this->appConfig->getKeys(Application::APP_ID);
 		if (in_array('notify_unsigned_user', $keys)) {
-			$current = $this->config->getAppValue(Application::APP_ID, 'notify_unsigned_user');
-			$this->config->setAppValue('activity', 'notify_email_libresign_file_to_sign', $current ? '1' : '0');
-			$this->config->deleteAppValue(Application::APP_ID, 'notify_unsigned_user');
+			$current = $this->appConfig->getValueString(Application::APP_ID, 'notify_unsigned_user');
+			$this->appConfig->setValueString('activity', 'notify_email_libresign_file_to_sign', $current ? '1' : '0');
+			$this->appConfig->deleteKey(Application::APP_ID, 'notify_unsigned_user');
 		}
 	}
 }
diff --git a/lib/Service/AccountService.php b/lib/Service/AccountService.php
index e3e6742363..4742dd25db 100644
--- a/lib/Service/AccountService.php
+++ b/lib/Service/AccountService.php
@@ -28,6 +28,7 @@
 use OCP\Accounts\IAccountManager;
 use OCP\AppFramework\Db\DoesNotExistException;
 use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\Config\IUserConfig;
 use OCP\Files\Config\IMountProviderCollection;
 use OCP\Files\File;
 use OCP\Files\IMimeTypeDetector;
@@ -35,7 +36,6 @@
 use OCP\Files\NotFoundException;
 use OCP\Http\Client\IClientService;
 use OCP\IAppConfig;
-use OCP\IConfig;
 use OCP\IGroupManager;
 use OCP\IL10N;
 use OCP\IURLGenerator;
@@ -61,8 +61,8 @@ public function __construct(
 		private SignFileService $signFileService,
 		private RequestSignatureService $requestSignatureService,
 		private CertificateEngineFactory $certificateEngineFactory,
-		private IConfig $config,
 		private IAppConfig $appConfig,
+		private IUserConfig $userConfig,
 		private IMountProviderCollection $mountProviderCollection,
 		private NewUserMailHelper $newUserMail,
 		private IdentifyMethodService $identifyMethodService,
@@ -160,7 +160,7 @@ public function createToSign(string $uuid, string $email, string $password, ?str
 
 		$this->updateIdentifyMethodToAccount($signRequest->getId(), $email, $newUser->getUID());
 
-		if ($this->config->getAppValue('core', 'newUser.sendEmail', 'yes') === 'yes') {
+		if ($this->appConfig->getValueString('core', 'newUser.sendEmail', 'yes') === 'yes') {
 			try {
 				$emailTemplate = $this->newUserMail->generateTemplate($newUser, false);
 				$this->newUserMail->sendMail($newUser, $emailTemplate);
@@ -262,8 +262,7 @@ private function getUserConfigByKey(string $key, ?IUser $user = null): string {
 		if (!$user) {
 			return '';
 		}
-
-		return $this->config->getUserValue($user->getUID(), Application::APP_ID, $key);
+		return $this->userConfig->getValueString($user->getUID(), Application::APP_ID, $key);
 	}
 
 	private function getUserConfigIdDocsFilters(?IUser $user = null): array {
@@ -271,7 +270,7 @@ private function getUserConfigIdDocsFilters(?IUser $user = null): array {
 			return [];
 		}
 
-		$value = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'id_docs_filters', '');
+		$value = $this->userConfig->getValueString($user->getUID(), Application::APP_ID, 'id_docs_filters', '');
 		if (empty($value)) {
 			return [];
 		}
@@ -285,7 +284,7 @@ private function getUserConfigCrlFilters(?IUser $user = null): array {
 			return [];
 		}
 
-		$value = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'crl_filters', '');
+		$value = $this->userConfig->getValueString($user->getUID(), Application::APP_ID, 'crl_filters', '');
 		if (empty($value)) {
 			return [];
 		}
@@ -299,7 +298,7 @@ private function getUserConfigCrlSort(?IUser $user): array {
 			return ['sortBy' => 'revoked_at', 'sortOrder' => 'DESC'];
 		}
 
-		$value = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'crl_sort', '');
+		$value = $this->userConfig->getValueString($user->getUID(), Application::APP_ID, 'crl_sort', '');
 		if (empty($value)) {
 			return ['sortBy' => 'revoked_at', 'sortOrder' => 'DESC'];
 		}
@@ -313,7 +312,7 @@ private function getUserConfigIdDocsSort(?IUser $user): array {
 			return ['sortBy' => null, 'sortOrder' => null];
 		}
 
-		$value = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'id_docs_sort', '');
+		$value = $this->userConfig->getValueString($user->getUID(), Application::APP_ID, 'id_docs_sort', '');
 		if (empty($value)) {
 			return ['sortBy' => null, 'sortOrder' => null];
 		}
diff --git a/tests/php/Unit/Service/AccountServiceTest.php b/tests/php/Unit/Service/AccountServiceTest.php
index 56cafff05d..0b19ad17da 100644
--- a/tests/php/Unit/Service/AccountServiceTest.php
+++ b/tests/php/Unit/Service/AccountServiceTest.php
@@ -32,6 +32,7 @@
 use OCA\Settings\Mailer\NewUserMailHelper;
 use OCP\Accounts\IAccountManager;
 use OCP\AppFramework\Db\DoesNotExistException;
+use OCP\Config\IUserConfig;
 use OCP\Files\Config\IMountProviderCollection;
 use OCP\Files\File;
 use OCP\Files\Folder;
@@ -39,7 +40,6 @@
 use OCP\Files\IRootFolder;
 use OCP\Files\NotFoundException;
 use OCP\IAppConfig;
-use OCP\IConfig;
 use OCP\IGroupManager;
 use OCP\IL10N;
 use OCP\IURLGenerator;
@@ -63,8 +63,8 @@ final class AccountServiceTest extends \OCA\Libresign\Tests\Unit\TestCase {
 	private FileTypeMapper&MockObject $fileTypeMapper;
 	private SignFileService&MockObject $signFile;
 	private CertificateEngineFactory&MockObject $certificateEngineFactory;
-	private IConfig&MockObject $config;
 	private IAppConfig&MockObject $appConfig;
+	private IUserConfig&MockObject $userConfig;
 	private IMountProviderCollection&MockObject $mountProviderCollection;
 	private NewUserMailHelper&MockObject $newUserMail;
 	private IdentifyMethodService&MockObject $identifyMethodService;
@@ -98,8 +98,8 @@ public function setUp(): void {
 		$this->signFile = $this->createMock(SignFileService::class);
 		$this->requestSignatureService = $this->createMock(RequestSignatureService::class);
 		$this->certificateEngineFactory = $this->createMock(CertificateEngineFactory::class);
-		$this->config = $this->createMock(IConfig::class);
 		$this->appConfig = $this->createMock(IAppConfig::class);
+		$this->userConfig = $this->createMock(IUserConfig::class);
 		$this->mountProviderCollection = $this->createMock(IMountProviderCollection::class);
 		$this->newUserMail = $this->createMock(NewUserMailHelper::class);
 		$this->identifyMethodService = $this->createMock(IdentifyMethodService::class);
@@ -130,8 +130,8 @@ private function getService(): AccountService {
 			$this->signFile,
 			$this->requestSignatureService,
 			$this->certificateEngineFactory,
-			$this->config,
 			$this->appConfig,
+			$this->userConfig,
 			$this->mountProviderCollection,
 			$this->newUserMail,
 			$this->identifyMethodService,
@@ -218,7 +218,7 @@ public function testCreateToSignWithErrorInSendingEmail():void {
 		$userToSign->method('getUID')->willReturn('username');
 		$this->userManager->method('createUser')->willReturn($userToSign);
 		$this->identifyMethodService->method('getIdentifyMethodsFromSignRequestId')->willReturn([]);
-		$this->config->method('getAppValue')->willReturn('yes');
+		$this->appConfig->method('getValueString')->willReturn('yes');
 		$template = $this->createMock(\OCP\Mail\IEMailTemplate::class);
 		$this->newUserMail->method('generateTemplate')->willReturn($template);
 		$this->newUserMail->method('sendMail')->willReturnCallback(function ():void {