how to make it so that different information is shown to each user on my application

I am creating an application for my students, where I want everyone to have access to their schedule, grades, and class log, personal account. How do I make my own information for each student?

You need to configure business process (function) that is activated by endpoint of getting information.
Inside of function (backend) you may use block Auth: Get Current User. So you get user ID or his class or whatever you need. After that you make database search request for data associated with requred parameter (selected user only).

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