Changes the editable username of a supergroup or channel, requires owner privileges in the supergroup or channel.
Request type for Tdjson#setSupergroupUsername.
New value of the username. Use an empty string to remove the username. The username can't be completely removed if there
is another active or disabled username.
Changes the editable username of a supergroup or channel, requires owner privileges in the supergroup or channel. Request type for Tdjson#setSupergroupUsername.