# File lib/fog/openstack/models/identity/ec2_credentials.rb, line 34
        def find_by_access_key(access_key)
          user_id = user ? user.id : nil

          ec2_credential =
            self.find { |ec2_credential| ec2_credential.access == access_key }

          unless ec2_credential then
            response = service.get_ec2_credential(user_id, access_key)
            body = response.body['credential']
            body = body.merge 'service' => service

            ec2_credential = Fog::Identity::OpenStack::EC2Credential.new(body)
          end

          ec2_credential
        end