A Flutter Simple scanning barcode App For tablet and Ipad crud app

We have a passkit system: The system allows the restaurant to generate the wallet passes to our client. That allows the restaurant/customer to track the number of meals he has left. The Pass shows how many meals of each type are left Chicken meals=4, Salmon=3 etc. When the client takes a certain type of meal from the restaurant we want update the pass by the new number count. We want create a scanning app. The pass kit system has an api that allows us to update the customers wallet passes . We want to create a simple app that allows the cashier to scan the barcode on the wallet card and update the wallet pass. The app should also allow us to add new members. Functional Steps for updating pass: Scan Barcode Choose What Meal to Decrement on the clients pass Confirm Passkit Api Steps for update pass Get PassDetails using barcode number Subtract 1 meal from the meal type chosen by the cashier Update the New Numbers to the pass. Functions to add A new member Add Name Phone Number Choose which tier(Each tier has own number of meals) Confirm Generate pass link/qr code Passkit api steps for adding Post Enroll Member with all details (especially distribute the meals on all three meal types) Get Member By member id recieved with previous step prototype of scanning feature [login to view URL] Api Documentation [login to view URL] I also have a pabbly workflow to make you understand the process of the backend We can also have a zoom meeting to discuss more