    # 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