Unable to access endpoints

I was unable to access the following endpoints:
http://cme.smhs.gwu.edu/quiz_result.json, which returns a list of quiz results, and
http://cme.smhs.gwu.edu/quiz_result_answer.json, which returns a list of quiz result answers. Both are returning a 403 Forbidden response. The credentials I am using appear to work for other endpoints, but not for these two.

Hello Jamie! I’m sorry to hear that you’re having trouble accessing the quiz result and quiz result answer endpoints. This sounds to me like a support issue, and our support team would be happy to assist you.

Please navigate to our support portal and open a ticket, and we’ll get this resolved for you ASAP.

Thank you!

Thank you Nathan - our company doesn’t yet have access to the support portal. It was never setup by our account manager, who we are unable to reach. Could you please point me to someone who could help get us access as this is a blocker? Thank you for your assistance. - Jamie