You can self edit your login details by creating a new user ID or Password, however, you have to be logged in to do so. We would also recommend ADDING YOUR EMAIL if you havent already done so yet.
Click Edit Details on the left side of your navigation bar (1) or on your name above (2); and make the changes as necessary - be sure to check that your email is listed; then click update to save.
Below is a close up of the edit user screen - you can change and update your details here, along with adding a valid email address which is now mandatory.