Seems the created_at column has no default value. This was always the case, at least that's what I can tell from a clean install and no migrations changing that default value.
```
$table->timestamp('created_at');
```
- Use Symfony's Session component to work with sessions, instead of a custom database model. Separate the concept of access tokens from sessions once again.
- Extract common session/remember cookie logic into SessionAuthenticator and Rememberer classes.
- Extract AuthenticateUserTrait into a new AuthenticationResponseFactory class.
- Fix forgot password process.
