Issue on extending-modx/plugins/system-events/onweblogin

## Affected page(s)

Doc says event fired AFTER login,
but user is clearly not logged in yet.
$user = $modx->getUser(); // will not work, or will return user id = 1

## What needs to be improved?

Fire event After user logged in in modx, so other code will universally use $modx->getUser(); and get right result
