aws-cdk-lib/aws-cognito: Cannot use the .addTrigger() method on an existing userpool

[BTech-Developer]

Describe the bug

I am currently unable to use the addTrigger() method on UserPool created in CDK.

Regression Issue

• Select this option if this issue appears to be a regression.

Last Known Working CDK Version

No response

Expected Behavior

userPool.addTrigger() should be a valid method for adding a trigger to a cognito user pool. Type hints should be available and working in any modern IDE.

Current Behavior

When attempting to call the addTrigger() method on a userpool, CDK fails to compile and states the method does not exist.

TSError: ⨯ Unable to compile TypeScript:
lib/stacks/myStack.ts:106:25 - error TS2339: Property 'addTrigger' does not exist on type 'IUserPool'.

106         cognitoUserPool.addTrigger()

Reproduction Steps

const cognitoUserPool = new UserPool(this, 'UserPool', {
                selfSignUpEnabled: true,
                accountRecovery: AccountRecovery.PHONE_AND_EMAIL,
                userVerification: {
                    emailStyle: VerificationEmailStyle.CODE,
                },
                autoVerify: {
                    email: true,
                },
                standardAttributes: {
                    email: {
                        required: true,
                        mutable: true,
                    },
                },
            });

// This does not work, even if the correct props are provided
cognitoUserPool.addTrigger()

Possible Solution

No response

Additional Information/Context

I've attempted updating version, invalidating caches, removing node_modules and reinstalling.

CDK CLI Version

2.178.1

Framework Version

No response

Node.js Version

v18.19.1

OS

Ubuntu 24

Language

TypeScript

Language Version

No response

Other information

No response

[pahud]

I think you should use cognitoUserPool.addTrigger(), no?

const cognitoUserPool = new UserPool(this, 'UserPool', {
                selfSignUpEnabled: true,
                accountRecovery: AccountRecovery.PHONE_AND_EMAIL,
                userVerification: {
                    emailStyle: VerificationEmailStyle.CODE,
                },
                autoVerify: {
                    email: true,
                },
                standardAttributes: {
                    email: {
                        required: true,
                        mutable: true,
                    },
                },
            });

// This does not work, even if the correct props are provided
cognitoUserPool.addTrigger()

[BTech-Developer]

I think you should use cognitoUserPool.addTrigger(), no?

const cognitoUserPool = new UserPool(this, 'UserPool', {
selfSignUpEnabled: true,
accountRecovery: AccountRecovery.PHONE_AND_EMAIL,
userVerification: {
emailStyle: VerificationEmailStyle.CODE,
},
autoVerify: {
email: true,
},
standardAttributes: {
email: {
required: true,
mutable: true,
},
},
});

// This does not work, even if the correct props are provided
cognitoUserPool.addTrigger()

Hey Pahud, please see the bottom of my inline code. I'm attempting to use .addTrigger() and it does not currently work.

[BTech-Developer]

Hey Pahud, typo in my example, if you see the TypeScript error output it's showing what does not currently work. The function is missing from the interface.

TSError: ⨯ Unable to compile TypeScript:
lib/stacks/myStack.ts:106:25 - error TS2339: Property 'addTrigger' does not exist on type 'IUserPool'.

106         cognitoUserPool.addTrigger()

[BTech-Developer]

Hey Pahud, we have to make a decision on whether or not to try and tackle this with L1 constructs or when this would be fixed for L2. Do you know what an approximate timeframe would be?