Add remember login

[ninioe]

Remember login is missing

Thanks
Erez

[tananaev]

It should automatically remember credentials like in Android app.

[ninioe]

It remember the server and the email but I have to enter the password again to login

[wpearse]

I imagine that it would work like this?

1. When user logs in, credentials are stored securely by the app (iOS Keychain?)
2. When user re-opens the app, the app should continue with previous session token
3. If the app detects that session token has expired, then the app should automatically attempt to re-authenticate using saved credentials
4. If saved credentials are not valid, then login screen is shown

[tananaev]

The way Android app works:

1. Credentials store in shared preferences. It's not the best option, but on Android keystore is not available on old versions and there are problems with it even on latest versions of Android. On iOS it probably makes sense to use keychain.
2. If process is running, session will be reused.
3. If process was killed for some reason, we create new session on start. If login is invalid, login screen is shown.

So it's very similar logic.