Answer
For an unpublished website, use https://research.umkc.edu/user/login
For a published website, you have two options:
- Sites List (https://research.umkc.edu/websites)
- UMKC's OpenScholar launch page (https://research.umkc.edu/get-started) and scroll to the bottom of the page until you find the Sites List (https://research.umkc.edu/websites).