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Amazon Cognito ExpiredCodeException

The confirmation code has expired.

Understanding Amazon Cognito

Amazon Cognito is a robust authentication service provided by AWS that enables developers to add user sign-up, sign-in, and access control to their web and mobile applications. It supports authentication through social identity providers such as Facebook, Google, and Amazon, as well as enterprise identity providers via SAML 2.0 and OpenID Connect.

Recognizing the Symptom: ExpiredCodeException

When using Amazon Cognito, you might encounter the ExpiredCodeException. This error typically manifests when a user attempts to confirm their account or reset their password using a confirmation code that is no longer valid.

What You Observe

Users report that they are unable to complete the sign-up or password reset process. The application may display an error message indicating that the confirmation code has expired.

Delving into the Issue: ExpiredCodeException

The ExpiredCodeException occurs when the confirmation code sent to the user has surpassed its validity period. Amazon Cognito generates these codes for account confirmation and password reset processes, and they are time-sensitive for security reasons.

Why It Happens

This issue arises when users do not use the confirmation code within the allotted time frame, which is typically set to a default duration by Amazon Cognito. Once expired, the code cannot be reused, and the user must request a new one.

Steps to Resolve ExpiredCodeException

To resolve this issue, you need to guide users to request a new confirmation code and ensure they use it promptly. Below are the steps to fix this issue:

Step 1: Request a New Confirmation Code

Instruct the user to request a new confirmation code. This can usually be done by triggering the resend confirmation code functionality in your application. Here is a sample AWS CLI command to resend a confirmation code:

aws cognito-idp resend-confirmation-code --client-id --username

Replace <your-client-id> and <user-email> with your actual client ID and the user's email address.

Step 2: Confirm the Code Promptly

Once the user receives the new confirmation code, advise them to enter it as soon as possible to avoid expiration. The validity period is typically short to enhance security.

Step 3: Adjust Code Expiry Settings (Optional)

If users frequently encounter this issue, consider adjusting the expiry settings of confirmation codes in your Amazon Cognito user pool. Refer to the AWS Cognito User Pool Settings documentation for guidance on configuring these settings.

Additional Resources

For more detailed information, you can explore the following resources:

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