code: def create_channel(
      target, credentials=None, scopes=None, ssl_credentials=None, **kwargs
  ):
      
      if credentials is None:
          credentials, _ = google.auth.default(scopes=scopes)
      else:
          credentials = google.auth.credentials.with_scopes_if_required(
              credentials, scopes
          )
  
      request = google.auth.transport.requests.Request()
  
      # Create the metadata plugin for inserting the authorization header.
      metadata_plugin = google.auth.transport.grpc.AuthMetadataPlugin(
          credentials, request
      )
  
      # Create a set of grpc.CallCredentials using the metadata plugin.
      google_auth_credentials = grpc.metadata_call_credentials(metadata_plugin)
  
      if ssl_credentials is None:
          ssl_credentials = grpc.ssl_channel_credentials()
  
      # Combine the ssl credentials and the authorization credentials.
      composite_credentials = grpc.composite_channel_credentials(
          ssl_credentials, google_auth_credentials
      )
  
      if HAS_GRPC_GCP:
          # If grpc_gcp module is available use grpc_gcp.secure_channel,
          # otherwise, use grpc.secure_channel to create grpc channel.
          return grpc_gcp.secure_channel(target, composite_credentials, **kwargs)
      else:
          return grpc.secure_channel(target, composite_credentials, **kwargs)
docs: Create a secure channel with credentials.
  
      Args:
          target (str): The target service address in the format 'hostname:port'.
          credentials (google.auth.credentials.Credentials): The credentials. If
              not specified, then this function will attempt to ascertain the
              credentials from the environment using :func:`google.auth.default`.
          scopes (Sequence[str]): A optional list of scopes needed for this
              service. These are only used when credentials are not specified and
              are passed to :func:`google.auth.default`.
          ssl_credentials (grpc.ChannelCredentials): Optional SSL channel
              credentials. This can be used to specify different certificates.
          kwargs: Additional key-word args passed to
              :func:`grpc_gcp.secure_channel` or :func:`grpc.secure_channel`.
  
      Returns:
          grpc.Channel: The created channel.