SetSystemSettingsAsync throw EventStore.Client.AccessDeniedException when connecting with ops but using admin credentials in request

[Lougarou]

Describe the bug
Creating a connection with Ops and then calling SetSystemSettingsAsync with Admin credentials throws AccessDeniedException when it should not.

To Reproduce
Steps to reproduce the behavior:

1. Establish a connection with Ops
2. Call client.SetSystemSettingsAsync(systemSettings, new UserCredentials("admin", "changeit"))
3. AccessDeniedException

Expected behavior
Operation should complete successfully.

Actual behavior

Client Side verbose logs:

14:45:53 DBG] Append to stream - $settings@Any.
[14:45:53 DBG] Starting gRPC call. Method type: 'ClientStreaming', URI: 'https://188.166.177.208:2113/event_store.client.streams.Streams/Append'.
[14:45:53 VRB] Starting deadline timeout. Duration: 00:00:04.9831440.
[14:45:54 DBG] Sending message.
[14:45:54 VRB] Serialized 'EventStore.Client.Streams.AppendReq' to 17 byte message.
[14:45:54 VRB] Message sent.
[14:45:54 VRB] Response headers received.
[14:45:54 INF] Call failed with gRPC error status. Status code: 'PermissionDenied', Message: 'Access Denied'.
[14:45:54 DBG] Finished gRPC call.
[14:45:54 VRB] Appending event to stream - { "streamName": "JHNldHRpbmdz" }@69a6738a-b59d-4103-a048-d682cd32138a $settings.
[14:45:54 ERR] Error writing message.
System.InvalidOperationException: Can't write the message because the call is complete.
[14:45:54 DBG] Completing client stream.
Unhandled exception. System.AggregateException: One or more errors occurred. (Status(StatusCode="PermissionDenied", Detail="Access Denied"))
---> EventStore.Client.AccessDeniedException: Status(StatusCode="PermissionDenied", Detail="Access Denied")
---> Grpc.Core.RpcException: Status(StatusCode="PermissionDenied", Detail="Access Denied")
--- End of inner exception stack trace ---
at EventStore.Client.Interceptors.TypedExceptionInterceptor.b__5_0[TRequest,TResponse](Task1 t) at System.Threading.Tasks.ContinuationResultTaskFromResultTask2.InnerInvoke()
at System.Threading.Tasks.Task.<>c.<.cctor>b__277_0(Object obj)
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
--- End of stack trace from previous location ---
at EventStore.Client.EventStoreClient.AppendToStreamInternal(AppendReq header, IEnumerable`1 eventData, EventStoreClientOperationOptions operationOptions, UserCredentials userCredentials, CancellationToken cancellationToken)
--- End of inner exception stack trace ---
at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
at System.Threading.Tasks.Task.Wait()
at ticket109639.Program.Main(String[] args)

Server Side logs:
Failed authorization check for "ops" in 00:30:37.3085738 with "streams : write p: {streamId : $settings} Deny : Policy : Legacy 1 12/31/9999 23:59:59 +00:00 : default:denied by default:Deny, $"

EventStore details

• EventStore server version: 20.10.2

• Operating system: MacOS

• EventStore client version (if applicable): 21.2