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