Retrieves a list of files in the Media Manager.
The listFiles() function returns a Promise that resolves to an array of the specified files' descriptors and cursor information.
To retrieve a list of files within a specific folder in the Media Manager, pass the folder's ID in the parentFolderId parameter. If no folder is specified, the function retrieves only the files in the root folder of the Media Manager.
To retrieve a list of (non-permanently) deleted files, use the listDeletedFiles() function.
You can only call this method when authenticated as a Wix app or Wix user identity.
Options to use when listing media files.