For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:DocB/openSUSE_Tumbleweed/home:DocB.repo
zypper refresh
zypper install tkusr
For openSUSE Leap 15.1 ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:DocB/openSUSE_Leap_15.1_ARM/home:DocB.repo
zypper refresh
zypper install tkusr
For openSUSE Leap 15.0 Ports run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:DocB/openSUSE_Leap_15.0_Ports/home:DocB.repo
zypper refresh
zypper install tkusr