func Logout(session sessions.Session, r render.Render, dbh *db.Dbh) {
sessionkey := session.Get("key")
uid := session.Get("uid")
session.Set("loggedin", "false")
session.Set("uid", nil)
session.Set("email", nil)
session.Set("key", nil)
if uid != "" && uid != nil {
dbh.DestroySession(uid.(int64), sessionkey.(string))
}
r.Redirect(utils.AppCfg.Url(), http.StatusFound)
}