What is the best way to auth, identify and store delicate information about users?
问题 With the purpose of learning about endpoints I'm building an app called "Where Are You?". The app lets users request the location of other users. The idea is that it does so by letting the user select a contact, lookup the contact by phone number in my endpoint. If found it means that the contact have the app and GCM is sent requesting the location. If the contact isn't found a SMS is sent with an url which will request the location through a browser, perform a http post of said location and