Starts validating immediately as you type...
Existing usernames in the database at the moment -
kaustavb, john_smith, zinedine_zidane.
The above usernames will not be available for choosing,
and will show in red
You can add your custom usernames and test the demo thoroughly!!
Just choose a username that is valid and submit it using the submit button.
Once submit is complete, that username will not be available anymore.