func Logout(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
	err := services.Logout(r)
	w.Header().Set("Content-Type", "application/json")
	if err != nil {
		w.WriteHeader(http.StatusInternalServerError)
	} else {
		w.WriteHeader(http.StatusOK)
	}
}
func (suite *AuthenticationServicesTestSuite) TestLogout(c *C) {
	user := models.User{
		Username: "haku",
		Password: "testing",
	}
	authBackend := auth.InitJWTAuthenticationBackend()
	tokenString, err := authentication.GenerateToken(user.UUID)
	token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
		return authBackend.PublicKey, nil
	})

	err = services.Logout(tokenString, token)
	assert.Nil(t, err)
}
func (suite *MiddlewaresTestSuite) TestRequireTokenAuthenticationAfterLogout(c *C) {
	resource := "/test/hello"

	requestLogout, _ := http.NewRequest("GET", resource, nil)
	requestLogout.Header.Set("Authorization", fmt.Sprintf("Bearer %v", token))
	services.Logout(requestLogout)

	response := httptest.NewRecorder()
	request, _ := http.NewRequest("GET", resource, nil)
	request.Header.Set("Authorization", fmt.Sprintf("Bearer %v", token))
	server.ServeHTTP(response, request)

	assert.Equal(t, response.Code, http.StatusUnauthorized)
}