Sorry for the newbie question, but I've scoured the docs without luck and am clearly just missing something.
I'm integrating the embeddable widget into our custom CRM, which is a multitenant web app. When I created my RC app in the dev portal, I tested using my user from that sandbox account, and the tutorials all had me setting up a clientId and adding that to the src url as a query param.
When I sign in to RC from within my CRM (using the widget) using a user from a completely different org (i.e. using a personal account), it doesn't seem to actually matter whether or not I include the clientId query param.
So, my question: do I actually need to include this query param if I simply want any one of our CRM customers to be able to sign in using the embeddable app and their org's RC credentials, (i.e. NOT my RC org). What am I missing here that's going to bite me when I release this to prod? Feels like it should be required, but it doesn't seem to be needed when I'm using a user account from outside of my org.