Json Web Token (JWT) Tutorial
It's very simple tutorial. There are token and user services to get user and generate access token.
Startup.cs has some configurations for dbcontext, jwt and services.

Get token -> https://localhost:44368/api/identity/Authenticate
Get token parameters -> https://localhost:44368/api/auth/token
Refresh token -> https://localhost:44368/api/identity/refreshtoken

Please run sql file on your sql server for database. File is in /Database/Blog.sql

You can use postman to test it