222406 web_api (2)

Good day I am redoing this project as I believe there was an error in understanding on the previous post. Basically: The api is built (ISP) and working I need a system that communicates with my ISP (on my site) so that I have all the info on my side if you know what I mean..... They should be able to sign up on my website and make orders etc with a back end that I have (Admin) access to see orders etc processed...The bid is to set up the front end site where my users can sign up and make orders. I will need a back end where I can view orders that have been processed etc and users must be able to login and see their orders etc... The code to connect with the api is attached It needs to be done in ASP.Net