setUserName()
setUserName(name, { thisMeetingOnly: boolean })
Programmatically set the local participant's user name that other participants see.
The name will be set via the user_name property in the DailyParticipant object corresponding to the local participant.
First argument is a string which is required; the second is an optional options object as follows:
{ thisMeetingOnly: boolean }.
Returns a Promise which resolves to the name that was set.