get
https://apibeta.familysearch.org/platform/sources//collections/descriptions
Read a list of all source descriptions in all user-defined collections owned by a specific user.
200The read was successful.
301Returned if the system failed to retrieve the Title and Citation.
307Returned if the system failed to retrieve the Citation. The title is user contributed.
400If the request was unable to be understood by the application.
404If the requested collection is not found.