title: Remember login information
body: <p>I would like to let the user register once and from that moment he won't need to login every time he open the app.
  How would I do that?should I save the login information on the device and load it every time he tries?is it safe?maybe save only his id and then load his info from the mysql db?</p>
  
  <p><strong>EDIT</strong>
  would you mind atleast telling me why do I get so many negative votes?so I could learn for the next time?</p>