You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: service.rb
    path of file: ./repos/vets-api/app/services/medical_copays/vbs
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module MedicalCopays
  module VBS
    ##
    # Service object for isolating dependencies in the {MedicalCopaysController}
    #
    # @!attribute request
    #   @return [MedicalCopays::Request]
   
    
      def get_copays
        raise InvalidVBSRequestError, request_data.errors unless request_data.valid?

        response = request.post("#{settings.base_path}/GetStatementsByEDIPIAndVistaAccountNumber", request_data.to_hash)

        # enable zero balance debt feature if flip is on
        if Flipper.enabled?(:medical_copays_zero_debt)
          zero_balance_statements = MedicalCopays::ZeroBalanceStatements.build(
            statements: response.body,
            facility_hash: user.vha_facility_hash
          )
          response.body.concat(zero_balance_statements.list)
        end