curl --request POST \
  --url https://api.opper.ai/v3/compat/v1beta/models/{model}:streamGenerateContent \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "contents": "<unknown>",
  "input": "<unknown>"
}
'

{
  "candidates": [
    {
      "content": {
        "parts": [
          {
            "codeExecutionResult": {},
            "executableCode": {},
            "functionCall": {},
            "inlineData": {},
            "text": "<string>",
            "thought": true,
            "thoughtSignature": "<string>"
          }
        ],
        "role": "<string>"
      },
      "index": 123,
      "finishReason": "<string>",
      "groundingMetadata": {},
      "urlContextMetadata": {}
    }
  ],
  "modelVersion": "<string>",
  "responseId": "<string>",
  "usageMetadata": {
    "cachedContentTokenCount": 123,
    "candidatesTokenCount": 123,
    "opper": {},
    "promptTokenCount": 123,
    "thoughtsTokenCount": 123,
    "totalTokenCount": 123
  }
}