No POD found for Facebook.pm. Time to read the source?
Facebook.pm
To install Plack::Middleware::OAuth, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Plack::Middleware::OAuth
CPAN shell
perl -MCPAN -e shell install Plack::Middleware::OAuth
For more information on module installation, please visit the detailed CPAN module installation guide.