def activities(options={})
      response = connection.get do |req|
        req.url "activities", options
      end
      return_error_or_body(response)
    end
def activities(options={})
      response = connection.get do |req|
        req.url "activities", options
      end
      return_error_or_body(response)
    end
Get a list of all activities for the authenticating client.

 @param [Hash]  options
 @option options Integer :campaign_id - Only return won rewards for this campaign.
 @option options String  :classification - Only return activities for users in this classification.
 @option options Integer :user_id - Only return won rewards for this user.
 @option options Integer :since - Only fetch updates since this time (UNIX timestamp)
 @option options Integer :limit - The maximum number of records to return.