Please can someone explain me the authentication service in config in the startup class because I have some issues here?

I know in depth how to create claims ,creadentials and Jwt and how to create it with hashing algoritm but i didn't understand any thing about configure it in startup class or any documentaion explain it.

services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)              .AddJwtBearer(options => options.TokenValidationParameters=new TokenValidationParameters{                  ValidateIssuerSigningKey=true,                  IssuerSigningKey=new SymmetricSecurityKey(Encoding.ASCII                       .GetBytes(Configuration.GetSection("AppSettings:Token").Value)),                       ValidateIssuer=false,                       ValidateAudience=false          });  

https://stackoverflow.com/questions/65623219/please-can-someone-explain-me-the-authentication-service-in-config-in-the-startu January 08, 2021 at 11:51AM