400 error at chat api media.download

In the chat API, there is an error causing return of http 400 for any use of the media.download API.

Steps to reproduce:
1) Get a valid resource ID for an uploaded attachment from chat.messages.attachment.get
2) Feed into media.download API

I believe the error is due to a mistake in the URL. Per https://developers.google.com/chat/api/reference/rest/v1/media/download and https://developers.google.com/chat/how-tos/get-attachment it may need to have "?alt=media" appended to the end of the URL to support download.

Start by locating the generated Chat API definition or client entry point for media.download and compare its request URL with the linked Google Chat documentation. Reproduce the call using a resource ID from chat.messages.attachment.get, then verify that the corrected request downloads the attachment instead of returning HTTP 400.

Scritto dal modello di indicizzazione a partire dal testo della issue.