gemini-20-flash-exp (generatecontent)

curl -X POST "https://gptproto.com/v1beta/models/:model:generateContent" \
  -H "Authorization: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{}'

{
  "error": {
    "message": "Invalid signature",
    "type": "401"
  }
}