feat: added pre-signup lambda to prevent cognito user creation #643
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juanarroqui
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Feb 5, 2026
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Looks good! Please take a look at the comments
| * @param event | ||
| */ | ||
| export const handler: Handler = async (event: PreSignUpTriggerEvent): Promise<PreSignUpTriggerEvent> => { | ||
| console.log('PRE_SIGNUP EVENT: \n' + JSON.stringify(event, null, 2)); |
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Added Pre-Signup lambda function to prevent default behavior from Cognito to register users from google sign in.
Type of Change*
Description
Default behavior for Cognito with Google SSO enables is to register users not in user pool yet. I've added a new lambda to prevent the user creation and return an error in cases where the user is not registered in the platform.
Testing*
Manual testing in dev environment.
Impact
No impact for application without google credentials set up.
Checklist*