Getting Data from Form for my login Page

Getting Data from Form for my login Page

Good Day,

I created a form that contains all the email address, phone number and status of the supposed user of my application, I'm wondering if it is possible to use the data from that form for my login page? Also can I configure my login page wherein it will only ask the email address (from the form I created) so the user can login? I also would like to disable to registration and forgot your password page for my portal.

Thanks