CheckPassword checks the password strength.

IsNotZeroString check s is not empty string and is not "0".

IsQuestionsIgnorePath checks whether the questionID is in ignore path.

IsReservedUsername checks whether the username is reserved.

IsSupportedImageFile currently answers support image type is `image/jpeg, image/jpg, image/png, image/gif, image/webp`.

IsUsersIgnorePath checks whether the username is in ignore path.