Represents changes in the status of a chat member.
Chat) – Chat the user belongs to.
User) – Performer of the action, which resulted in the change.
int) – Date the change was done in Unix time.
ChatMember, optional) – Previous information about the chat member.
ChatMember, optional) – New information about the chat member.
ChatInviteLink, optional) – Chat invite link, which was used by the user to join the chat; for joining by invite link events only.