For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:convoy/15.6/home:convoy.repo
zypper refresh
zypper install pam_twolevel
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:convoy/15.5/home:convoy.repo
zypper refresh
zypper install pam_twolevel
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:convoy/15.4/home:convoy.repo
zypper refresh
zypper install pam_twolevel
For 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:convoy/15.3/home:convoy.repo
zypper refresh
zypper install pam_twolevel