aws/aws-sdk-net

First of all, thank you for the great work.
I am creating an authentication process using Cognito's StartWithCustomAuthAsync, but I am having an issue with the userAttributes email being undefined in the lambda function that is triggered by this execution. Do you have a solution?

• client side code

  private static IDictionary<string, string> CreateClientMetadata(string username)
        {
            Dictionary<string, string> meta = new Dictionary<string, string>
            {
                { "USERNAME", username },
                { "PASSWORD", Random.RandomString(30) },
                { "name", username }
            };
            return meta;
        }
  
        private static IDictionary<string, string> CreateAuthParameters(string username)
        {
            var authParams = new Dictionary<string, string>
            {
                { "USERNAME", username },
                { "PASSWORD", Random.RandomString(30) },
                { "email", "test@gmail.com" }
            };
            return authParams;
        }
  
        private CognitoUser CreateCognitoUser(string username)
        {
            var provider =
                new AmazonCognitoIdentityProviderClient(new AnonymousAWSCredentials(), RegionEndpoint.APNortheast1);
            var userPool = new CognitoUserPool(Settings.POOL_ID, Settings.CLIENT_ID, provider);
            return new CognitoUser(username, Settings.CLIENT_ID, userPool, provider);
        }
  
        public async Task<string> Signup(string username)
        {
            var user = this.CreateCognitoUser(username);
  
            var authRequest = new InitiateCustomAuthRequest()
            {
                ClientMetadata = this.CreateClientMetadata(username),
                AuthParameters = this.CreateAuthParameters(username)
            };
            var authResponse = await user.StartWithCustomAuthAsync(authRequest).ConfigureAwait(false);
        }

• lambda code

import { CognitoUserPoolTriggerHandler } from 'aws-lambda';

export const handler: CognitoUserPoolTriggerHandler = async event => {
    if (!event.request.session || !event.request.session.length) {
         event.request.userAttributes.email
    }
}