How to implement a proper login system for an application where other applications can access a particular service?

Question

I am developing a movie ticket selling application in asp.net core where a registered user can buy tickets. There are some other applications which can insert new movie ticket in ticket selling application.

1. How to implement a proper login system for the other applications and give them access for a service?

2. How to manage customers and other applications ?

Answer 1

Based on your needs, you might want to take a look at Token based authentication with OAUTH 2.0. Second option would be Identity .