def listUsage(*args)
      options = args.last.is_a?(Hash) ? args.pop : {}
      get('applications/listUsage', options)
    end
def listUsage(*args)
      options = args.last.is_a?(Hash) ? args.pop : {}
      get('applications/listUsage', options)
    end
Returns the API usage per day for this application.
 @accessibility: public key, secret key
 @methods: GET
 @format: json, jsonp
 @authenticated: true
 @limited: false
 @return [Hashie::Rash] API usage per day for this application.
 @param application [Integer] Defaults to null
 @param days [Integer] Defaults to 30, Maximum length of 30
 @example Returns the API usage per day for this application.
   Disqussion::Client.applications.listUsage
 @see http://disqus.com/api/3.0/applications/listUsage.json