How to reproduce:

1. Create a new user account (with Admin privileges)
2. Open Unity in that account
3. Log-in to the services
- Make sure that the Remember Me checkbox is unchecked
4. Unity simply quits
- No stack trace is provided in the Editor.log
- This happens every time the Remember Me checkbox is unchecked
- This happens exactly once when the Remember Me box is checked (after the box was unchecked) and does not appear to happen anymore for any subsequent attempts with a checked box
- The issue does not appear to happen in all cases (which is why a fresh new user account is necessary for reproduction)

- Reproduced in Version 5.3.3p1 (828971bd30e1), Version 5.4.0b8 (f1df44d39d69)
- Not reproducible in Version 5.2.4f1 (98095704e6fe)