Great question! The platform sets the user name by default to user###. A user can change the name only for a limited period of time.
Currently, the maximum number of days after registration that accounts can change their username is 7 days. After the 7 days, a moderator can change the user name for you.
If the 7 days have passed, you can tag @support_team and one of the moderators will change the name for you. Be sure to validate that you are not requesting a name that has already been taken. To validate that requested name is available, please look up the new name on the users page.
The reason the period to change a user name is so short, is because referrals to posts made under the old user name, will be broken, once the change is made.
