I need to change the user name to make it - AbrajAlwahaj

As per your request, we have changed your account username from "Aftan_Mohammed" to "AbrajAlwahaj". Please note that if you were using custom URLs, they will no longer work, so you will have to create new ones: https://www.jotform.com/help/261-How-to-Create-a-Custom-URL-of-a-Form

Open a new forum thread if you need anything else, we will be glad to assist you.