As a user in N.A.Ph.D. Theses, you have direct access to the personal data that you have stated during your registration either for checking or updating them. You can modify any of your personal data you want (Name, Surname, Phone, Password, etc.) after logging in with your password and selecting "Update Data". Since your email is identical to the Username, it is not possible to change it. If you wish to use a different email, you will need to re-register in N.A.Ph.D. Theses.