Usernames can only be set when creating a new account.
Usernames may be between 3-12 characters long and can be a combination of numbers, letters and some symbols (._-)
Currently users don’t have the ability of changing usernames inside the app after account creation.
NOTE: Usernames may not contain any language that could be deemed vulgar, offensive or a violation of community values or terms of service. Violations may result in usernames being automatically modified by administrators, or accounts being suspended or banned.