I think using this in the form presented there would be a mistake. However, if you have a two-part registration, where the first part, for example, requires an

I think using this in the form presented there would be a mistake. However, if you have a two-part registration, where the first part, for example, requires an email (that needs to be confirmed), you could use something like this to request the next set of registration data while waiting for the confirmation email to be received by the user.