At Stone River eLearning you are required to use an Email address as your User Name. Personally we prefer this so we don't need to remember our other User Name:
How to Change Your User Name
1. After logging into your account, open your account info in the upper right and choose 'Edit Profile'
2. Enter your new UserName (this must be an email address) into the 'Email Address' field, then click the 'Update Profile' button