Content type of the media.
File name. Null if absent.
Server-assigned unique identifier for the media.
Size of the media in bytes.
Returns the direct content URL for the media.
This URL is impermanent, it will expire in several minutes and cannot be cached. If the URL becomes expired, you need to request a new one. Each call to this function produces a new temporary URL.
Represents media information for a message in a channel.