Optional is_True, if the user is a member of the chat.
User permissions in the chat.
Point in time (Unix timestamp) when restrictions will be lifted from the user; 0 if never. If the user is restricted for more than 366 days or for less than 30 seconds from the current time, the user is considered to be restricted forever.
The user is under certain restrictions in the chat. Not supported in basic groups and channels. Subtype of ChatMemberStatus.