regular_ssl_credentials = grpc.ssl_channel_credentials()

channel = google.auth.transport.grpc.secure_authorized_channel(

credentials, regular_endpoint, request,

credentials, request, regular_endpoint,

ssl_credentials=regular_ssl_credentials)

Option 2: create a mutual TLS channel by calling a callback which returns

try:

channel = google.auth.transport.grpc.secure_authorized_channel(

credentials, mtls_endpoint, request,

credentials, request, mtls_endpoint,

client_cert_callback=my_client_cert_callback)

except MyClientCertFailureException:

# handle the exception

else:

endpoint_to_use = regular_endpoint

channel = google.auth.transport.grpc.secure_authorized_channel(

credentials, endpoint_to_use, request,

credentials, request, endpoint_to_use,

ssl_credentials=default_ssl_credentials)

Option 4: not setting ssl_credentials and client_cert_callback. For devices

certificate and key::

channel = google.auth.transport.grpc.secure_authorized_channel(

credentials, regular_endpoint, request)

credentials, request, regular_endpoint)

The following code uses mtls_endpoint, if the created channle is regular,

and API mtls_endpoint is confgured to require client SSL credentials, API

calls using this channel will be rejected::

channel = google.auth.transport.grpc.secure_authorized_channel(

credentials, mtls_endpoint, request)

credentials, request, mtls_endpoint)

Args:

credentials (google.auth.credentials.Credentials): The credentials to