Base url the model is hosted under.
If none, defaults to the Ollama client default.
Supports userinfo auth in the format http://username:password@localhost:11434.
Useful if your Ollama server is behind a proxy.
userinfo is not secure and should only be used for local testing or
in secure environments. Avoid using it in production or over unsecured
networks.
If using userinfo, ensure that the Ollama server is configured to
accept and validate these credentials.
userinfo headers are passed to both sync and async clients.
base_url: str | None = None