The contact information for the exposed API.
A short description of the API. CommonMark syntax MAY be used for rich text representation.
The license information for the exposed API.
A URL to the Terms of Service for the API. MUST be in the format of a URL.
**REQUIRED**. The title of the API.
**REQUIRED**. The version of the OpenAPI document (which is distinct from the [OpenAPI Specification version](https://swagger.io/specification/#oas-version) or the API implementation version).
The object provides metadata about the API. The metadata MAY be used by the clients if needed, and MAY be presented in editing or documentation generation tools for convenience.