Last login TimeStamp

[FatihKoz]

Add a carbon timestamp for last login instead of using updated_at. Update login controller to save last login details along with user ip (both tied to the same setting due to GDPR)

Closes #1516

Possible Error/Exception Warning

If the admin is already logged off during update, when he/she tries to login after update there will be an exception about missing database field.

Workaround For Admins

• Disable IP recording before update (re-enable it after completing migration and cleaning cache) or,
• Visit /update manually after the error (technically authentication is completed at that moment and process fails during model update only)

[nabeelio]

Where's the missing DB field message coming from?

[FatihKoz]

Where's the missing DB field message coming from?

LoginController, line 117 of my pr... As expected it is trying to save the login timestamp before running the migration (maybe a try and catch ?)

[nabeelio]

Let's see how it goes

[FatihKoz]

Probably admins will get 500 server error if they are already logged out (deleted cache before update, session lifetime etc).
And if they visit /update or admin dashboard after that error all will be fine.