@aws-amplify/amplify-category-auth/provider-utils/awscloudformation/triggers/PreTokenGeneration/alter-claims.js

amplify-cli authentication plugin

/**
 * @type {import('@types/aws-lambda').PreTokenGenerationTriggerHandler}
 */
exports.handler = async (event) => {
  event.response = {
    claimsOverrideDetails: {
      claimsToAddOrOverride: {
        attribute_key1: 'attribute_value1',
        attribute_key2: 'attribute_value2',
      },
      claimsToSuppress: ['attribute_key3'],
    },
  };
  // Return to Amazon Cognito
  return event;
};