My mail password is being used as my username for atlassian. I want to bring this to attention.

I'm afraid you pasted (or mis-auto-filled, if you are using a password safe, as you ought to be) your password into your chosen display name when you created the account.

You can change and should this yourself at https://id.atlassian.com/manage-profile/profile-and-visibility  but I very strongly recommend changing the password first!

Thanks for sharing @Shirish Khadgi . Did u raise a request through the support portal?