For medium post about identityserver

clientcredentials1.cs

public class Config
{
    // scopes define the API resources in your system
    public static IEnumerable<ApiResource> GetApiResources()
    {
        return new List<ApiResource>
        {
            new ApiResource("TheApi", "The Example API")
        };
    }

    // clients want to access resources (aka scopes)
    public static IEnumerable<Client> GetClients()
    {
        // client credentials client
        return new List<Client>
        {
            new Client
            {
                ClientId = "TheClientId",
                AllowedGrantTypes = GrantTypes.ClientCredentials,

                ClientSecrets = 
                {
                    new Secret("secret".Sha256())
                },
                AllowedScopes = { "TheApi" }
            }
        };
    }
}