code: @Override
      public VerifyUserAttributeResult verifyUserAttribute(VerifyUserAttributeRequest request) {
          request = beforeClientExecution(request);
          return executeVerifyUserAttribute(request);
      }
docs: <p>
  Verifies the specified user attributes in the user pool.
  </p>
  
  @param verifyUserAttributeRequest
  Represents the request to verify user attributes.
  @return Result of the VerifyUserAttribute operation returned by the service.
  @throws ResourceNotFoundException
  This exception is thrown when the Amazon Cognito service cannot find the requested resource.
  @throws InvalidParameterException
  This exception is thrown when the Amazon Cognito service encounters an invalid parameter.
  @throws CodeMismatchException
  This exception is thrown if the provided code does not match what the server was expecting.
  @throws ExpiredCodeException
  This exception is thrown if a code has expired.
  @throws NotAuthorizedException
  This exception is thrown when a user is not authorized.
  @throws TooManyRequestsException
  This exception is thrown when the user has made too many requests for a given operation.
  @throws LimitExceededException
  This exception is thrown when a user exceeds the limit for a requested AWS resource.
  @throws PasswordResetRequiredException
  This exception is thrown when a password reset is required.
  @throws UserNotFoundException
  This exception is thrown when a user is not found.
  @throws UserNotConfirmedException
  This exception is thrown when a user is not confirmed successfully.
  @throws InternalErrorException
  This exception is thrown when Amazon Cognito encounters an internal error.
  @sample AWSCognitoIdentityProvider.VerifyUserAttribute
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/cognito-idp-2016-04-18/VerifyUserAttribute"
  target="_top">AWS API Documentation</a>