On almost any service it’s crucial that you sign up with an email address.
you’re free to configure both your full name and a separate display name.
By default, the full name is taken from your email address and the display name isnt filled.
punch your profile picture in the top-right corner, then punch Edit profile.
In the edit profile popup, key in your preferred nickname in the Display name text box.
Its also recommended that you configure your Full name.
put in your preferred nickname in the Display name box and optionally edit your Full name too.