Change 6-digit code to an email link during signup

[vmatsiiako]

Feature description

During signup, users get an email with a 6-digit code that they later need to copy and paste into the next signup step. Ideally, we would not to substitute it to an email link that people click and it automatically opens up the next signup step (after verifying that the link is correct).

Why would it be useful?

Links are both more secure and effortless than 6-digit codes. This would be very good to have!