Thanks but this solution is overly complex for such a simple requirement as limiting the number of sign ups

Hi Antonio, I've been working on implementing the advice you shared, which involves integrating Pre-Signup Lambda Triggers into my Cognito user pool. The logic implemented by lambda is: if the number of users in the userpool exceeds 3, an exception will be thrown and signup will stop. Given that my user pool already contains three users, I proceeded to attempt the addition of a new user through my Vue application. I think the Pre-Signup Lambda Triggers did work, because I truly received an exception in my browser. But the new user are still added in to my userpool with their confirmation status marked as "confirmed". Could you give me some information about what‘s wrong with my code? ========Lambda Code============= import json import boto3 def lambda_handler(event, context):

TODO implement

cognito_client = boto3.client('cognito-idp') user_pool_id = 'ap-northeast-1_******' response = cognito_client.list_users( UserPoolId=user_pool_id, AttributesToGet=[], Limit=0 ) user_count = len(response['Users'])

if user_count >= 3: raise Exception("Stop signup: the number of accounts is over 3") else: return event