Passing token directly to GRPCClient causes error

When passing a token string directly to GRPCClient, I get an error from RPC.

```
Traceback (most recent call last):
File "/opt/nautobot/plugins/cloudvision_chatbot/cloudvision_chatbot/test.py", line 28, in
test_test = test()
File "/opt/nautobot/plugins/cloudvision_chatbot/cloudvision_chatbot/test.py", line 21, in test
for batch in client.get(query):
File "/opt/nautobot/lib/python3.9/site-packages/cloudvision/Connector/grpc_client/grpcClient.py", line 197, in
return (self.decode_batch(nb) for nb in stream)
File "/opt/nautobot/lib/python3.9/site-packages/grpc/_channel.py", line 426, in __next__
return self._next()
File "/opt/nautobot/lib/python3.9/site-packages/grpc/_channel.py", line 826, in _next
raise self
grpc._channel._MultiThreadedRendezvous: <_MultiThreadedRendezvous of RPC that terminated with:
status = StatusCode.UNAVAILABLE
details = "failed to connect to all addresses"
debug_error_string = "{"created":"@1624296069.697848021","description":"Failed to pick subchannel","file":"src/core/ext/filters/client_channel/client_channel.cc","file_line":3008,"referenced_errors":[{"created":"@1624296069.697841974","description":"failed to connect to all addresses","file":"src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc","file_line":397,"grpc_status":14}]}"
```

Comienza con cloudvision_chatbot/test.py, especialmente con la llamada a GRPCClient y client.get(query), y después inspecciona cloudvision/Connector/grpc_client/grpcClient.py alrededor del manejo del stream que se muestra en el traceback. Reproduce el caso de direct-token contra el servicio de CloudVision correspondiente y determina por qué la RPC no puede conectarse; se considera completado cuando la misma solicitud termina sin el error UNAVAILABLE.

Escrito por el modelo de indexación a partir del texto del issue.