Exchange OAuth code

curl --request POST \
  --url https://api.buildwithtrace.com/api/v2/auth/exchange-code \
  --header 'Content-Type: application/json' \
  --data '
{
  "code": "<string>",
  "provider": "google"
}
'

{
  "access_token": "<string>",
  "refresh_token": "<string>",
  "token_type": "bearer",
  "user": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "email": "jsmith@example.com",
    "full_name": "<string>",
    "plan": "free",
    "avatar_url": "<string>",
    "created_at": "2023-11-07T05:31:56Z"
  }
}