interface BoxGenerateServiceURLParamsAccess selects the login mode, mutually exclusive with the minted token. Omit the field for token mode: mint a short-lived service token (default). "restricted" — LangSmith login: the sandbox's creator, or any user with SandboxesExec on it (admins by default). "workspace" — LangSmith login: any member of the owning workspace. "off" — remove an existing LangSmith login grant and mint a token. A LangSmith login grant is durable; token mode is refused (409) while one exists.