我希望用户只输入一次密码，以便将来再也不用输入密码

In my rails app, I use http basic authentication. The app is for mobile only, and I don't want the user to have to keep logging in every time they open the page. Is there any way to store the user/pass for future uses of the app. I don't really need it to ever expire, but I just want to at least keep the logging in to very minimum after there first visit.In my rails app, I use http basic authenticatio