Third-party launchers such as BlueFetch can send an access token (user_accesscode), refresh token (refresh_token) and the refresh token expiration time (refresh_token_expiration) in seconds. Access tokens take precedence over the user name and password fields.
When the refresh_token_expiration time elapses, the user is signed out. Third-party launchers must send a new intent with the refreshed user_accesscode, refresh_token and refresh_token_expiration before the expiration time of the previous toke elapses.
