curl -X POST https://api.rapidcall.ai/api/auth/google \
  -H "Content-Type: application/json" \
  -d '{ "credential": "eyJhbGciOi..." }'

{
  "token": "eyJhbGciOiJIUzI1NiIs...",
  "user": {
    "id": "usr_001",
    "name": "John Smith",
    "email": "[email protected]"
  },
  "workspace": {
    "id": "ws_abc123",
    "name": "My Company"
  }
}