How do I become the call organizer in Join.me?

I've been asked to lead the call, I know how to dial in and join the right call, but what next? I'm not offered an option to become the organizer.

Additional Posts

If you use the 'sign in' option instead of directly entering the code, you'll be set as the organizer if your GTM user created the call.

I wasn't provided a sign in option afaik. I called the join me number, was asked to enter the group code (which I did), then it just sat there telling me we're waiting for the organizer.
@TylerHarms Sorry, they've changed the interface slightly. There's a bottom-right button that says 'My Meetings' that will list pre-scheduled meetings. Clicking that will ask you to log in using the credentials in 1password
My interaction with join.me was all over the phone, I did not use a gui, it was just a conference call. I got the number to call from the google calendar invite. I finally figured out that I can hit * and it'll ask for a password, but the password stored in 1pass has a dash in it (which I cant enter on a phone).