Call to krb5ktauth missing hostname parameter
This line here https://gitlab.cern.ch/linuxsupport/rpms/cern-get-certificate/-/blob/d7c6e5983200addef490641569fe7dbd4ac73ac2/src/cern-get-certificate.pl#L837 is missing the first parameter ($hostname).
That causes the function call to fail because the following parameters are all shifted over.
Reauthenticating using keytab file.
using keytab file name: MEMORY:cgcccache.9
keytab file not readable.
Error: Cannot authenticate using keytab file.