AWS Cognito SignUp/Confirm/SignIn example .NET 6(C#)

AWSCognitoTestApp.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net6.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Amazon.Extensions.CognitoAuthentication" Version="2.2.2" />
    <PackageReference Include="AWSSDK.CognitoIdentity" Version="3.7.0.159" />
    <PackageReference Include="AWSSDK.CognitoIdentityProvider" Version="3.7.2.23" />
    <PackageReference Include="AWSSDK.Core" Version="3.7.11.3" />
  </ItemGroup>

</Project>

main.cs

// https://www.exceedsystem.net/2022/05/21/how-to-implement-user-authentication-using-aws-cognito-in-csharp/
// License: MIT
using Amazon;
using Amazon.Runtime;
using Amazon.CognitoIdentityProvider;
using Amazon.CognitoIdentityProvider.Model;
using Amazon.Extensions.CognitoAuthentication;

// Pool ID of the user pool
const string USER_POOL_ID = "region_xxxx";
// App client ID of the app client
const string APP_CLIENT_ID = "xxxx";

// Account user name
const string USER_NAME = "Foo";
// Account password
const string PASSWORD = "P@ssw0rd";
// Account e-mail address
const string EMAIL = "mail@example.com";
// Confirmation code
const string CONFIRMATION_CODE = "123456";

var cognitoIdClient = new AmazonCognitoIdentityProviderClient(
    new AnonymousAWSCredentials(),
    RegionEndpoint.APNortheast1);

// 1. Sign up for a new account
await SignUp(cognitoIdClient, APP_CLIENT_ID, USER_NAME, PASSWORD, EMAIL);

// 2. Confirm e-mail address with a confirmation code
await Confirm(cognitoIdClient, USER_NAME, APP_CLIENT_ID, CONFIRMATION_CODE);

// 3. Sign in with the new account
await SignIn(cognitoIdClient, USER_POOL_ID, APP_CLIENT_ID, USER_NAME, PASSWORD);

static async Task SignUp(AmazonCognitoIdentityProviderClient cognitoIdClient, string clientId, string userName, string password, string email)
{
    try
    {
        var regRequest = new SignUpRequest
        {
            ClientId = clientId,
            Username = userName,
            Password = password,
            UserAttributes = { new AttributeType { Name = "email", Value = email } }
        };

        var ret = await cognitoIdClient.SignUpAsync(regRequest);
    }
    catch (Exception e)
    {
        Console.WriteLine($"{e.Message}");
    }
}

static async Task Confirm(AmazonCognitoIdentityProviderClient cognitoIdClient, string userName, string clientId, string confirmationCode)
{
    try
    {
        var confirmSignUpRequest = new ConfirmSignUpRequest
        {
            Username = userName,
            ClientId = clientId,
            ConfirmationCode = confirmationCode,
        };

        var ret = await cognitoIdClient.ConfirmSignUpAsync(confirmSignUpRequest);
    }
    catch (Exception e)
    {
        Console.WriteLine($"{e.Message}");
    }
}

static async Task SignIn(AmazonCognitoIdentityProviderClient cognitoIdClient, string userPoolId, string clientId, string userName, string password)
{
    try
    {
        var cognitoUserPool = new CognitoUserPool(userPoolId, clientId, cognitoIdClient);
        var cognitoUser = new CognitoUser(userName, clientId, cognitoUserPool, cognitoIdClient);

        var ret = await cognitoUser.StartWithSrpAuthAsync(new InitiateSrpAuthRequest { Password = password });
    }
    catch (Exception e)
    {
        Console.WriteLine($"{e.Message}");
    }
}