RSS Feed/News Best way to delete previous record?

[ENXF NET]

I have an upload form and users can upload a file, but I would like to check on save if they already have an entry, if so then delete it.

So I'm trying to do it in my actionSave:

Code:

public function actionSave(ParameterBag $params) {
    // validate form inputs

// check if user already has an entry, if so delete it
}

I already have a functioning actionDelete:

Code:

$plugin = $this->plugin('XF:Delete');
return $plugin->actionDelete(
$signup,
$this->buildLink('signup/delete'...

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