var tokenResponse = await protocolClient.RequestClientCredentialsTokenAsync(new ClientCredentialsTokenRequest
                    {
                        Address = disco.TokenEndpoint,
                        ClientId = ServiceIdentity,
                        ClientSecret = ServiceKey,
                        Scope = "offline_access",
                        GrantType = "GrantTypes.ClientCredentials"
                    });
                    return tokenResponse.AccessToken;