@User how to add a prefetch webhook for my inbound call assistant

Set up an assistant hook with "async": false in your assistant’s config, pointing to your server URL that returns dynamic assistant responses before the call begins.. https://docs.vapi.ai/assistants/assistant-hooks

Am I missing something? Which hook here would be fired before the call starts? I've been wondering this too - how I'd send assistantOverrides to an incoming call. I'm having a hard time finding it in the docs if it does exist. https://cdn.discordapp.com/attachments/1395042870502756362/1395059875628847114/image.png?ex=68791241&is=6877c0c1&hm=eba60c4daa55ad857282e8fb6e9ceb687a2adabb89a717e8711ce421b9f07a3e&

same in vapi dashboard i cant findem