TokenUsage

{
    "prompt_tokens": 0,
    "completion_tokens": 0,
    "output_tokens": 0,
    "total_tokens": 0,
    "prompt_tokens_details": {
        "property1": "string",
        "property2": "string"
    },
    "completion_tokens_details": {
        "property1": "string",
        "property2": "string"
    },
    "property1": "string",
    "property2": "string"
}