Need help with the project with the provided code, c# language:

The aim of the project is to create a distributed system that uses REST API for communication between system components in any technology $($suggested $.$NET$).$ SYSTEM DESCRIPTION: The online auction system should enable users to list and bid on items in various categories. All data should be stored in a permanent manner $($XML$,$ database$).$ When designing and implementing, the MVC or equivalent model must be strictly adhered to$.$

$1.$ Create a REST API that allows you to support users: a$.$ Adding a user

b$.$ Editing a user

c$.$ Deleting a User

d$.$ Retrieving user information

$2.$ Create a REST API that allows

b$.$ Editing an item for bidding

c$.$ Removing an item from the auction

d$.$ Downloading information about the item at the auction

$3.$ Create a REST API that will allow you to make a payment for the auctioned item $-$ in this case, use the sanbox of the selected payment operator

$4.$ Create an interface that allows you to conduct auctions in the selected technology.

The functionalities listed with individual tasks are only illustrative and do not constitute full functionality.