def memberships(organization_id)
      http.get(membership_endpoint(organization_id)) do |response|
        Rexpense::Entities::MembershipCollection.build response
      end
    end
def memberships(organization_id)
      http.get(membership_endpoint(organization_id)) do |response|
        Rexpense::Entities::MembershipCollection.build response
      end
    end
Get organization memberships

 [API]
   Method: <tt>GET /api/v1/organizations/:id/memberships</tt>

   Documentation: http://developers.rexpense.com/api/memberships#index