Cisco DNA Center Platform Intent API: Authentication and Authorization section. Specifies the use of the Authorization header for token generation and the x-auth-token for subsequent requests.
Python Documentation (v3.x): Section 8.3: Handling Exceptions. Explains the try...except Exception as e syntax for catching and referencing runtime errors.
Requests Library Documentation: Section: Response Status Codes. Documentation for requests.codes confirms the mapping of UNAUTHORIZED to 401 and SERVER_ERROR to 500.
Cisco DevNet Associate (200-901) Official Cert Guide: Chapter 12: IP Connectivity and First Hop Redundancy Protocols (contextualized for API error handling and status code management in automation).