How to make a Login Page take you to another Page where user details are automatically filled in?

Good day to all, I am trying to build an app where a user logs in and that takes them to another page where their details are automatically filled and they just need to fill in one field. My problem is I have already set up the login page but every time I click the sign in button it takes me back to the home page. Any suggestions on how I can fix this and also auto fill the details on my other page? Regards Glyn
1 answers

With which data should this page be prefilled? Where does that data come from?