C# Dependency Injection - Authentication

I am trying to figure out .net core dependency injection. My project is currently a web api, with some custom authentication. I've added my authentication like so (in Startups.cs under "ConfigureServices":

services.AddAuthentication(Authentication.Hmac.HmacDefaults.AuthenticationScheme).AddHmac(options =>
                {
                    options.AuthName = "myname";
                    options.CipherStrength = HmacCipherStrength.Hmac256;
                    options.EnableNonce = true;
                    options.RequestTimeLimit = 5;
                    options.PrivateKey = "myprivatekey";
                });

My question is this: How do you access IMemoryCache within the authentication service? I've tried just created a new MemoryCache and passing it in, but that doesn't work. The main goal is for checking Nonce values (see if they are in the cache, if yes auth fails, if no, add to cache auth passes).

Again, this is .NET Core 2 (Web API).