User-Authentication should be implemented to access sensitive data

Hello community, I am looking for a solution for an application. Here's what I want to achieve: in a Snap App, the user should first log in. For this, he should scan his ID card (which has a barcode). The scanned barcode should now be linked to a permission link to a folder stored on a OneDrive drive. In this folder, there are partially sensitive data that should be displayed on the tablet running the app. This concerns a process in the food industry. In our country, businesses processing food are sporadically and without prior notice inspected by veterinary offices or similar authorities. As part of the inspection, on-site employees must, among other things, present their health certificates. These data should be made available through the above-mentioned folder structures and protected through authentication. Has any of you ever implemented a similar requirement and can give me a tip on how to reference the correct folder via authentication data? I am already grateful for any advice!