fix: cluster credentials to fit new schema

silverback/_cli.py

@@ -793,8 +793,8 @@ def registry_auth():
 @cluster_client
 def credentials_list(cluster: "ClusterClient"):
     """List container registry credentials"""
-
-    if creds := list(cluster.registry_credentials):
+    
+    if creds := cluster.registry_credentials:
         click.echo(yaml.safe_dump(creds))
 
     else:

silverback/cluster/client.py

@@ -268,9 +268,8 @@ def health(self) -> ClusterHealth:
     def registry_credentials(self) -> dict[str, RegistryCredentials]:
         response = self.get("/credentials")
         handle_error_with_response(response)
-        return {
-            creds.name: creds for creds in map(RegistryCredentials.model_validate, response.json())
-        }
+
+        return response.json()
 
     def new_credentials(
         self, name: str, docker_server: str, docker_username: str, docker_password: str, docker_email: str