CODEWITHSUNDEEP
pythonpython-3.xaws-lambdaamazon-cognito
user1651602
user1651602

Reputation: 108

Python Lambda giving botocore.errorfactory.InvalidLambdaResponseException when triggered on postconfirmation

I have setup AWS Lambda function that is triggered on an AWS Cognito. The trigger on a successful email confirmation. The Lambda function is in Python3.6.

I am referring to the AWS documentation for Cognito postConfirmation trigger. https://docs.aws.amazon.com/cognito/latest/developerguide/user-pool-lambda-post-confirmation.html

"response": {}

So far I have tried returning None, {}, '{}'(empty json string) or valid dictionary like {'status':200, 'message':'the message string'} but it is giving error.

botocore.errorfactory.InvalidLambdaResponseException: An error occurred (InvalidLambdaResponseException) when calling the ConfirmSignUp operation: Unrecognizable lambda output

What should be a valid response for the post confirmation function? here is the part of code.

from DBConnect import user

import json

def lambda_handler(event, context):

    ua = event['request']['userAttributes']
    print("create user ua = ", ua)
    if ('name' in ua):
        name = ua['name']
    else:
        name = "guest"
    newUser = user.create(
        name = name,
        uid = ua['sub'],
        owner = ua['sub'],
        phoneNumber = ua['phone_number'],
        email = ua['email']
    )
    print(newUser)
    return '{}' #  <--- I am using literals here only.

Upvotes: 1

Views: 530

Answers (1)

kerasbaz
kerasbaz

Reputation: 1794

You need to return the event object:

return event

This is not obvious in the examples they provide in the documentation. You may want to check and ensure the event object does contain a response key (it should).

Upvotes: 2

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