def valid_scope(scope)
				raise Exception.new("Invalid scope: no account_ids key") if !scope.key?(:account_ids)
				raise Exception.new("Invalid scope: no campaigns key") if !scope.key?(:campaigns)
				return true
			end
def valid_scope(scope)
				raise Exception.new("Invalid scope: no account_ids key") if !scope.key?(:account_ids)
				raise Exception.new("Invalid scope: no campaigns key") if !scope.key?(:campaigns)
				return true
			end
Internal:: Validates the scope attribute given in the constructor

 Author:: jlopezn@neonline.cl

 === Parameters
 * +scope+ - value for the 'scope' key in the has initializer

 Returns:: true if the scope specification is valid. Raises Exception otherwise

 Raises:: Exception if the scope is not valid