using if statements

redirect_after_login1.js

app.use(function(req, res, next) {
  if (req.path !== '/auth' &&
      req.path !== '/login' &&
      req.path !== '/logout' &&
      req.path !== '/signup' &&
      req.path !== '/img' &&
      req.path !== '/fonts' &&
      req.path !== '/favicon') {
    req.session.returnTo = req.path;
    next();
  }
  next();
});