Duplicate Lambda Invocation Causing Magic Link Email Error: "Please wait for one minute before sending new link"

[singhjaskaran0501]

Hi.

I am experiencing an issue when sending a magic link to a user's email. While the magic link is generated, the process simultaneously throws an error with the message: "Please wait for one minute before sending new link."

Upon reviewing the logs, it appears that the Lambda function create-auth-challenge is being invoked twice.

Could you provide guidance or a resolution for this issue?

[ottokruse]

Sounds like you are actually invoking initiateAuth twice. Perhaps a React hook in strict mode. But that's guessing. Can you tell us how we can reproduce this?

[singhjaskaran0501]

Application is implemented using SvelteKit rather than React. Upon reviewing the application logs, I confirmed that the requestSignInLink method is being invoked only once by the web application. Is there be anything internally that could be the cause of twice invoking of that lambda.

[singhjaskaran0501]

However, despite receiving the magic link, I am unable to log in with it. Upon reviewing the logs further, it appears that the verifyMagicLink method is not being triggered during the login attempt.

Could you provide guidance on what might be causing this issue? Are there specific configurations, middleware, or conditions that could prevent the verifyMagicLink method from being invoked? Any suggestions for further troubleshooting would be greatly appreciated.

[ottokruse]

I''m sorry mate that's too little information to help you. Perhaps you can share a HAR file so we can look at the AJAX requests that actually go to Cognito.

Also please share how you are invoking the library--give us something to work with please.

[singhjaskaran0501]

Hi @ottokruse , sure let me add bit more explanation.

I am working on implementing a magic link functionality for user authentication using their email address. The process involves calling the requestSignInLink method, which successfully sends a magic link to the user's email as expected. However, an unexpected issue arises immediately after the magic link is sent.

Specifically, the "create-auth-challenge" Lambda function (refer to the uploaded image) is being invoked twice—once as intended and then again within just 3 seconds. This causes an error indicating that the system requires a minimum wait time of one minute between sending magic links.

From the application's perspective, which is built using SvelteKit, the requestSignInLink function is being called only once. I am unsure why the Lambda function is being triggered twice in such a short interval. What could be causing this issue?

[ottokruse]

Can you share a HAR file too? How have you established that the frontend really only calls Cognito once? Review the network panel, are there 2 calls there? If yes the issue is on frontend side, if no the issue is on Cognito side.

How does the issue appear in the frontend? The user sees an error, or is it only logged in the browser console or so?

[singhjaskaran0501]

Hi, I cannot share HAR file from browser, as we are working with sveltekit and requestSigninLink method is being called on server side. So Generating HAR file is not possible at the moment.