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AWS CognitoとUnityによるパスワードなしメール認証を試してみた。

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概要

CognitoとUnityによるパスワードなしメール認証について情報が少なく、ハマったので方法をシェアします。

準備

以下の記事を参考にAWSの設定を行ってください。
https://dev.classmethod.jp/articles/cognito-lambda-passwordless/#toc-10

Unityでのポイント

ポイントは以下の2点です。

  1. SignUpAsyncでユーザープールにユーザーを作成した後に、StartWithCustomAuthAsyncを叩いてCustomAuthを開始する必要がある。
  2. さらにメールで受け取ったコードを入力としてRespondToCustomAuthAsyncを叩いて、メールを確認済みとする必要がある。

実際のコード

SignUp.cs
    var userPool = new CognitoUserPool(UserPoolId, AppClientID, _provider);
    var user = new CognitoUser(email, AppClientID, userPool, _provider);
    var authRequest = new InitiateCustomAuthRequest
    {
        AuthParameters = new Dictionary<string, string>(StringComparer.Ordinal)
        {
            {
                "USERNAME",
                "username"
            }
        },
        ClientMetadata = new Dictionary<string, string>(StringComparer.Ordinal)
    };

    var result = user.StartWithCustomAuthAsync(authRequest).ConfigureAwait(false).GetAwaiter()
        .GetResult();

    _sessionID = result.SessionID;
    _userName = result.ChallengeParameters["USERNAME"];
Confirm.cs
   var userPool = new CognitoUserPool(UserPoolId, AppClientID, _provider);
    var user = new CognitoUser(email, AppClientID, userPool, _provider);
    var authRequest = new RespondToCustomChallengeRequest
    {
        ChallengeParameters = new Dictionary<string, string>(StringComparer.Ordinal)
        {
            {
                "ANSWER",
                confirmationCode
            },
            {
                "USERNAME",
                _userName
            }
        },
        SessionID = _sessionID
    };
    var result = user.RespondToCustomAuthAsync(authRequest).ConfigureAwait(false).GetAwaiter().GetResult();
  

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