Create Completion

{
  "id": "<string>",
  "object": "<string>",
  "created": 123,
  "model": "<string>",
  "choices": [
    {
      "index": 123,
      "text": "<string>",
      "logprobs": {
        "text_offset": [
          123
        ],
        "token_logprobs": [
          123
        ],
        "tokens": [
          "<string>"
        ],
        "top_logprobs": [
          {}
        ]
      },
      "finish_reason": "<string>"
    }
  ],
  "usage": {
    "prompt_tokens": 123,
    "total_tokens": 123,
    "completion_tokens": 123
  }
}