```
set system login tacacs server 1.2.3.4 key 'test'
commit
```
journalctl:
VyOS-for-Smoke-Tests sudo[5413]: PAM unable to dlopen(pam_tacplus.so): /lib/security/pam_tacplus.so: cannot open shared object file: No such file or directory
VyOS-for-Smoke-Tests sudo[5413]: PAM adding faulty module: pam_tacplus.so
VyOS-for-Smoke-Tests commit[5417]: Successful change to active configuration by user vyos on /dev/ttyS0
VyOS-for-Smoke-Tests sudo[5489]: PAM unable to dlopen(pam_tacplus.so): /lib/security/pam_tacplus.so: cannot open shared object file: No such file or directory