[BUGFIX] Clean up API code
Some changes in the previous releases (especially loadBackendUser()) now break results, where a virtual "ter" user is loaded.
In addition, some previously unneeded public methods are now changed to protected.
Some changes in the previous releases (especially loadBackendUser()) now break results, where a virtual "ter" user is loaded.
In addition, some previously unneeded public methods are now changed to protected.