post
https://apibeta.familysearch.org/platform/sources/collections/
Update a user-defined collection. The Source Folder resource defines the interface for a source folder. This resource is used to update a source folder. The default source folder is the folder without a name. If a folder isn't specified when a source is attached, the source will be put in the default folder.
204The update was successful.
400The requested collection id is invalid.
404The requested collection is not found.