Protected endpoint

If your Ollama endpoint is protected with a header token, you can specify the token like this:

query := llm.Query{
    Model: model,
    Messages: []llm.Message{
        {Role: "system", Content: systemContent},
        {Role: "user", Content: userContent},
    },
    Options: options,
    TokenHeaderName: "X-TOKEN",
    TokenHeaderValue: "john_doe",
}