This optional parameter allows you to force the type of
authentication to be used in the Tacacs+ request sent to the Tacacs+
server. Options are ‘PAP’ and ‘ASCII’. The default is to choose PAP if the
version of Authen::TacacsPlus is 0.16 or greater, otherwise
ASCII.
# Force ASCII auth regardless of the version of
# Authen::TacacsPlus installed
AuthType ASCII