If you created your account prior to 12/19/17, we changed your username to conform to new authentication rules. Your new username is now the email address AMC has on file for you.

Once you log in for the first time, you can use the 'Edit Profile' section of My Outdoors to update your username to a different one provided it is in the form of an email address (sample@xxxxx.yyy) and doesn't conflict with an existing username.