I see instructions for single sign on, but not sure what this means. I have an oracle database containing user names and email addresses. Is there anyway to connect these "user accounts" to Q2A? Or, is the single-sign on only related to other schemas for mySQL? Any way to do this? Otherwise, it seems like my users will need to have two accounts. One account for the existing oracle-related functions for my own software, and a second account for Q2A. Obviously I want to avoid that if possible. What do people do in this circumstance?