Future exception was never retrieved
future: <Future finished exception=<_Rendezvous of RPC that terminated with:
        status = StatusCode.CANCELLED
        details = "Channel closed!"
        debug_error_string = "{"created":"@1566275570.766000000","description":"Error received from peer ipv4:192.168.0.21:443","file":"src/core/lib/surface/call.cc","file_line":1052,"grpc_message":"Channel closed!","grpc_status":1}"
>>
Traceback (most recent call last):
  File "C:\Users\whyyo\AppData\Local\Programs\Python\Python37\lib\concurrent\futures\thread.py", line 57, in run
    result = self.fn(*self.args, **self.kwargs)
  File "C:\Users\whyyo\AppData\Roaming\Python\Python37\site-packages\aiogrpc\utils.py", line 126, in _next
    return next(self._iterator)
  File "C:\Users\whyyo\AppData\Roaming\Python\Python37\site-packages\grpc\_channel.py", line 364, in __next__
    return self._next()
  File "C:\Users\whyyo\AppData\Roaming\Python\Python37\site-packages\grpc\_channel.py", line 358, in _next
    raise self
grpc._channel._Rendezvous: <_Rendezvous of RPC that terminated with:
        status = StatusCode.CANCELLED
        details = "Channel closed!"
        debug_error_string = "{"created":"@1566275570.766000000","description":"Error received from peer ipv4:192.168.0.21:443","file":"src/core/lib/surface/call.cc","file_line":1052,"grpc_message":"Channel closed!","grpc_status":1}"
>
Future exception was never retrieved
future: <Future finished exception=<_Rendezvous of RPC that terminated with:
        status = StatusCode.CANCELLED
        details = "Channel closed!"
        debug_error_string = "{"created":"@1566275570.766000000","description":"Error received from peer ipv4:192.168.0.21:443","file":"src/core/lib/surface/call.cc","file_line":1052,"grpc_message":"Channel closed!","grpc_status":1}"
>>
Traceback (most recent call last):
  File "C:\Users\whyyo\AppData\Local\Programs\Python\Python37\lib\concurrent\futures\thread.py", line 57, in run
    result = self.fn(*self.args, **self.kwargs)
  File "C:\Users\whyyo\AppData\Roaming\Python\Python37\site-packages\aiogrpc\utils.py", line 126, in _next
    return next(self._iterator)
  File "C:\Users\whyyo\AppData\Roaming\Python\Python37\site-packages\grpc\_channel.py", line 364, in __next__
    return self._next()
  File "C:\Users\whyyo\AppData\Roaming\Python\Python37\site-packages\grpc\_channel.py", line 358, in _next
    raise self
grpc._channel._Rendezvous: <_Rendezvous of RPC that terminated with:
        status = StatusCode.CANCELLED
        details = "Channel closed!"
        debug_error_string = "{"created":"@1566275570.766000000","description":"Error received from peer ipv4:192.168.0.21:443","file":"src/core/lib/surface/call.cc","file_line":1052,"grpc_message":"Channel closed!","grpc_status":1}"