public async Task RespondToMfaAuthAsync()

in src/Amazon.Extensions.CognitoAuthentication/CognitoUserAuthentication.cs [450:484]
30 lines of code
3 McCabe index (conditional complexity)

        public async Task<AuthFlowResponse> RespondToMfaAuthAsync(RespondToMfaRequest mfaRequest, CancellationToken cancellationToken)
        {
            if (mfaRequest == null)
            {
                throw new ArgumentNullException(nameof(mfaRequest));
            }

            RespondToAuthChallengeRequest challengeRequest = new RespondToAuthChallengeRequest
            {
                ChallengeResponses = new Dictionary<string, string>
                    {
                        { GetChallengeParamCodeName(mfaRequest.ChallengeNameType), mfaRequest.MfaCode},
                        { CognitoConstants.ChlgParamUsername, Username }
                    },
                Session = mfaRequest.SessionID,
                ClientId = ClientID,
                ChallengeName = mfaRequest.ChallengeNameType
            };

            if (!string.IsNullOrEmpty(SecretHash))
            {
                challengeRequest.ChallengeResponses.Add(CognitoConstants.ChlgParamSecretHash, SecretHash);
            }

            RespondToAuthChallengeResponse challengeResponse =
                await Provider.RespondToAuthChallengeAsync(challengeRequest, cancellationToken).ConfigureAwait(false);

            UpdateSessionIfAuthenticationComplete(challengeResponse.ChallengeName, challengeResponse.AuthenticationResult);

            return new AuthFlowResponse(challengeResponse.Session,
                challengeResponse.AuthenticationResult,
                challengeResponse.ChallengeName,
                challengeResponse.ChallengeParameters ?? new Dictionary<string, string>(),
                new Dictionary<string, string>(challengeResponse.ResponseMetadata.Metadata ?? new Dictionary<string, string>()));
        }