Hi, wondering if anyone has had experience in developing an app that allows a User to log in and automatically loads the app with data from their own API? I plan to have multiple Users with their own API. The underlying app will do the same thing but just load different data. Thanks
It seems to me what you describe is exactly how any dynamic web-app works 
I don’t understand where you want to bring us with this question. What is it you want to know exactly? Or maybe things are not clear in your head.
Using Bubble, your users will have accounts, and they will access data based on a logic you will implement. You 100% can create your app in a way that UserA can not access UserB’s data.