How to Link an Account to E-mail

To link your profile, go to Settings → Link → Mail. Enter your email details and come up with a password. Wait for a confirmation email at the email address you specified. After successful email confirmation you will be able to restore your game profile on your own or log in to your account from any device. 

If you didn't receive the confirmation e-mail, you need to check your spam folder. 

Mainsettings - Account linking

@Mail - Link

Registration - Email - Password - OK