Given this AWS SDK code snippet to authenticate a user, what will be the output if the password is incorrect?

Given this AWS SDK code snippet to authenticate a user, what will be the output if the password is incorrect?

const params = {
  AuthFlow: 'USER_PASSWORD_AUTH',
  ClientId: 'abc123',
  AuthParameters: {
    USERNAME: 'user1',
    PASSWORD: 'wrongpass'
  }
};
cognito.initiateAuth(params, (err, data) => {
  if (err) console.log(err.code);
  else console.log('Success');
});