def get_campaigns_by_account_id(account_id)
			response = call(:get_campaigns_by_account_id, 
				{account_id: account_id})
			response_hash = get_response_hash(response, __method__)
			campaigns = response_hash[:campaigns][:campaign].map do |camp_hash|
				BingAdsApi::Campaign.new(camp_hash)
			end
			return campaigns
		end
def get_campaigns_by_account_id(account_id)
			response = call(:get_campaigns_by_account_id, 
				{account_id: account_id})
			response_hash = get_response_hash(response, __method__)
			campaigns = response_hash[:campaigns][:campaign].map do |camp_hash|
				BingAdsApi::Campaign.new(camp_hash)
			end
			return campaigns
		end
Public : Constructor

 Author:: jlopezn@neonline.cl

 options - Hash with the parameters for the client proxy and the environment

 Examples
   options = {
     :environment => :sandbox,
     :username => "username",
     :password => "password",
     :developer_token => "DEV_TOKEN",
     :customer_id => "123456",
     :account_id => "654321"
   }
   service = BingAdsApi::CampaignManagement.new(options)

 Operations Wrappers 

 Public : Returns all the campaigns found in the specified account

 Author:: jlopezn@neonline.cl

 === Parameters
 account_id - account who owns the campaigns

 === Examples
   campaign_management_service.get_campaigns_by_account_id(1)
   # => Array[BingAdsApi::Campaign]

 Returns:: Array of BingAdsApi::Campaign

 Raises:: exception