'ruby-meetup2' gem usage

ruby-meetup2 is a Ruby client for working with the Meetup API.

This gem can be used to retrieve data from api.meetup.com using the API key or the OAuth2 access token.
For the OAuth2 flow the omniauth-meetup gem can be used.

I noticed the ruby-meetup2 gem is compatible with ruby version 2.0 and not the older versions.

ruby-meetup2 gem github link:
https://github.com/fun-ruby/ruby-meetup2

omniauth-meetup gem github link:
https://github.com/tapster/omniauth-meetup