Do Google plan to provide an alternative API which would allow an individual to list out the photographs and the albums in their own Google account? The photoslibrary.readonly.appcreateddata scope mentioned by @CCLU above only allows photos added by an application to be listed. Whereas I wish to list out all my photos and the albums they are in.

My actual requirement is as follows:

Remove photographs from my personal Google photos account which are not in an album.  Obviously, I take lots of photos of the same scene, add the best to an album and share.  However, I don't want to keep all the other pictures, but I have no indication which photos are in an album, so flying blind when deleting photos.  Perhaps some indication could be added to the photos app?