userRoutes.POST("/login", ensureNotLoggedIn(), performLogin)

func performLogin(c *gin.Context) {
  username := c.PostForm("username")
  password := c.PostForm("password")
  if isUserValid(username, password) {
    token := generateSessionToken()
    c.SetCookie("token", token, 3600, "", "", false, true)
    //is_logged_in is not working in template
    c.Set("is_logged_in", true)
    render(c, gin.H{"title": "Successful Login"}, "login-successful.html")
  } else {
    c.HTML(http.StatusBadRequest, "login.html", gin.H{
        "ErrorTitle":   "Login Failed",
        "ErrorMessage": "Invalid credentials provided",
    })
  }
}

{{ if .is_logged_in }}
      <li><a href="/article/create">Create Article</a></li>
{{ end }}
{{ if not .is_logged_in }}
    <li><a href="/u/register">Register</a></li>
{{end}}

render(c, gin.H{"title": "Successful Login", "is_logged_in": c.MustGet("is_logged_in").(bool)}, "login-successful.html")