In order to support multiple conventions and clubs a unique URL had to be used that represents the platform supporting the conventions and clubs.  I already had this domain so I used this domain for the platform.  

When you are signing up for an account and receive an error message that the “username is taken”.  This means that you already have an account on the RCS platform and will just have to perform a Password Recovery to create a new password so that you can login.  Since this platform supports multiple conventions and clubs, your account information was entered through one of the other conventions or clubs.