If you are 13 years of age or older, you can create your own username. To make logging in quick and easy, choose a username that is easy to remember.
Since public comments and messages include your username, you can decide whether you want your username to include any personally identifiable information.
There are a just few guidelines for creating a username:
Maximum 24 characters long
Can include any combination of letters and numbers, as well as underscores ( _ )
Must begin with a letter
Cannot consist entirely of numbers
Cannot include spaces or other punctuation marks (other than underscores)
If you are under 13 years of age, you can select from a list of options to create a safe, anonymous username.