I’m using CDK for the infrastructure and Amplify for the front end. I’m new to it. So maybe I was missing something.

What I want is to send an email with a verification code to validate it when a user is created by the command AdminCreateUserCommand and not the default invitation email. I use Amplify in the front end to handle the sign-in.

I implemented the configuration in the cognito constructor to verify the user’s email but it didn’t work.

I read the documentation to see how could I implement this feature, but I didn’t find anything about it. Some posts and blogs said that it’s not possible to do this thing using admin flow, I mean creating a user by AdminCreateUserCommand. Only in normal flow, I mean when the user signs up themselves. Also, I added a trigger lambda to customize the message.

Note: the conditions work as expected.

The constructor cognito:

autoVerify: {
                email: props.emailVerificationRequired
            },
            userVerification: props.userVerificationRequired
                ? {
                      emailSubject: 'Verify your email for our awesome app!',
                      emailBody:
                          'Hello {username}, Thanks for signing up to our awesome app! Your verification code is {####}',
                      emailStyle: cognito.VerificationEmailStyle.CODE
                  }
                : undefined,
            standardAttributes: {
                email: {
                    required: true,
                    mutable: false
                }
            },
            customAttributes: {
                locale: new cognito.StringAttribute({ mutable: true })
            },
            lambdaTriggers: {
                preSignUp: preSignUpLambda,
                customMessage: props.userVerificationRequired ? customMessage : undefined
            },

Lambda in charge of creating a user:

const userPoolId = process.env.COGNITO_USER_POOL_ID;
    console.log('userPoolId', userPoolId);
    const params = {
        UserPoolId: userPoolId,
        Username: validatedEmail,
        DesiredDeliveryMediums: ['EMAIL' as const],
        TemporaryPassword: validatedPassword,
        UserAttributes: [
            {
                Name: 'locale',
                Value: validatedLocale
            },
            {
                Name: 'email',
                Value: validatedEmail
            }
        ],
        ClientMetadata: {
            appName: process.env.APP_NAME || 'myApp'
        }
    };
    console.log('params', params);
    try {
        await cognitoClient.send(new AdminCreateUserCommand(params));