Dancer::Auth::GoogleAuthenticator - Two-Factor demo app
http://stackoverflow.com/questions/549/the-definitive-guide-to-forms-based-website-authentication
To install Auth::GoogleAuthenticator, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Auth::GoogleAuthenticator
CPAN shell
perl -MCPAN -e shell install Auth::GoogleAuthenticator
For more information on module installation, please visit the detailed CPAN module installation guide.