Correct! If you are offering the course as an AP, you need to submit the audit which, once approved will get you access to a released multiple choice exam. Then you should be good to go!
If you need directions to submit the audit just head to this link. It goes step-by-step. For some other AP courses, the audit process can be daunting, but with code.org, they did all the hardest work for you in terms of the audit - you just need to let the college board know you are using their materials.