Hello. Set the authorization through classmates to your website.
But when clicking on the icon opens a window with a form where you are prompted to enter your email -
To continue login to the site, you must enter your e-mail address
And is there any way that people could log in without entering your email, that's a lot of action.
After all, the very essence of authorization is to go to the site or register one or two clicks of the mouse Input and allow.