Vapi is amazing but for non-english its still far away where we need to be. Currently sitting around 1700ms for a response (Groq, Llama3, Deepgram). I‘m using custom Deepgram API keys and it says I shouldnt use them if I want to have a direct onprem and faster response, but cant delete my deepgram keys. I dont‘t get it. How will I be charged then?