model.auth.beforeImpersonate
Triggered in October\Rain\Auth\Concerns\HasImpersonation.
Example usage:
$model->bindEvent('model.auth.beforeImpersonate', function (\October\Rain\Database\Model|null $oldUser) use (\October\Rain\Database\Model $model) {
traceLog($oldUser->full_name . ' is now impersonating ' . $model->full_name);
});