diff --git a/lib/models/requests/oauth/register_client.dart b/lib/models/requests/oauth/register_client.dart
index c4ef68f..cf4f9e0 100644
--- a/lib/models/requests/oauth/register_client.dart
+++ b/lib/models/requests/oauth/register_client.dart
@@ -16,6 +16,9 @@ abstract class OAuthRegisterClientRequest with _$OAuthRegisterClientRequest {
     IList<GrantType>? grantTypes,
     IList<Uri>? redirectUris,
     IList<ResponseType>? responseTypes,
+
+    @Default(AuthMethod.none)
+    @JsonKey(name: "token_endpoint_auth_method")
     AuthMethod? authMethod,
   }) = _OAuthRegisterClientRequest;
 
diff --git a/lib/widgets/mxc_image.dart b/lib/widgets/mxc_image.dart
deleted file mode 100644
index 74ebe39..0000000
--- a/lib/widgets/mxc_image.dart
+++ /dev/null
@@ -1,11 +0,0 @@
-import "package:flutter/material.dart";
-import "package:flutter_riverpod/flutter_riverpod.dart";
-
-class MxcImage extends ConsumerWidget {
-  const MxcImage({super.key});
-
-  @override
-  Widget build(BuildContext context, WidgetRef ref) {
-    return const Placeholder();
-  }
-}