View Source ExTDLib.Method.CreateSupergroupChat (ExTDLib v0.0.4)

Returns an existing chat corresponding to a known supergroup or channel. Returns object_ptr<Chat>.

NameTypeDescription
supergroup_idstringSupergroup or channel identifier.
forceboolPass true to create the chat without a network request. In this case all information about the chat except its type, title and photo can be incorrect.

More details on telegram's documentation.