Retrieves a user's group channel invitation preference. See this page to learn more about channel types.
Note: Users are subject to both user-specific and channel-wide invitation preferences. Of the two, the invitation preference set for a specific user takes precedence over the default channel invitation preference.
If successful, this action returns the value of the channel invitation preference of the user in the response body.
Indicates for the user whether or not to automatically join a group channel promptly from an invitation without having to accept it. The value of false indicates that users can accept or decline an invitation to join a group channel. (Default: true)
In the case of an error, an error object is returned. A detailed list of error codes is available here.