How can I update my username?

I'd like to change my username from 'navin1911' to 'talenpac'

Hi, we can change the username for you. Please provide 3 possible usernames in order of preference, and we will change it to the first one that we find available. Also, please note that custom URLs will no longer work once the username is changed, so if you are currently using any, you will need to set it up again: https://www.jotform.com/help/261-How-to-Create-a-Custom-URL-of-a-Form

Forgot to mention that "talenpac" is not available.