Cognito User Pool not recognized in lambda trigger
After successfully creating an AWS cognito User Pool, I wanted to insert a lambda trigger for sign-up flow.
But the created lambda does not have a trigger
Even if I want to create a manual trigger on the lambda It does not recognize the User Pool I Created
If I create a lambda function first, however, I can see it from the cognito User Pool trigger menu. But after linking the lambda, it still has no trigger
I have looked at these common errors without luck
There is no error pop-up or any other feedback
I am in the same region in both the User Pool and Lambda.
The lambda function has the right Resource-based policy statement
How can I make it so that my lambda function trigger recognizes the Cognito User Pool?
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Hi,
Cognito does not create the Lambda's Trigger.
You should check whether the Lambda's Permissions contain a Resource-based policy statements like this:
{
"Version": "2012-10-17",
"Id": "default",
"Statement": [
{
"Sid": "lambda-allow-cognito",
"Effect": "Allow",
"Principal": {
"Service": "cognito-idp.amazonaws.com"
},
"Action": "lambda:InvokeFunction",
"Resource": "<your Lambda function ARN>",
"Condition": {
"StringEquals": {
"AWS:SourceAccount": "<your account number>"
},
"ArnLike": {
"AWS:SourceArn": "<your user pool ARN>"
}
}
}
]
}
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Yes, it does have a Resource-based policy statement like the one you mentioned. (I edited the question to show it)
This resource-based policy means you're already successful. The Lambda in my own environment does not have a Trigger, but the Lambda runs fine.
You're right. It fires fine. It's just misleading that the trigger does not show up in the lambda function overview.