Optionalcallback_Optionalchannel_Output only. Additional identifier set by the channel that represents a specific id used by the channel.
OptionalstateOutput only. The state of the channel credentials integration. When a channel is activated, the user is prompted for credentials that must be validated and in some cases exchanged by a long-lived token (Instagram).
The secret used to verify the channel callbacks for channels which support callback verification. The callback verification is not needed for Sinch-managed channels because the callbacks are not leaving Sinch internal networks. Max length is 256 characters. Note: leaving channel_callback_secret empty for channels with callback verification will disable the verification.