Adding to this - first thing I self hosted was vaultwarden so keeping track of the admin accounts is so easy. Make an admin account at the start to set it up, then only use that in a private window for any settings changes needed. My personal account is then like a normal user which helps me test it and keep it separate. I try and use SSO for everything so it also tests if that works correctly - I.e. after setting it up I’ll login to my personal account on the SSO to see if it registers correctly and that my username is given regular access.
Adding to this - first thing I self hosted was vaultwarden so keeping track of the admin accounts is so easy. Make an admin account at the start to set it up, then only use that in a private window for any settings changes needed. My personal account is then like a normal user which helps me test it and keep it separate. I try and use SSO for everything so it also tests if that works correctly - I.e. after setting it up I’ll login to my personal account on the SSO to see if it registers correctly and that my username is given regular access.