$profile_picture_base_url
$profile_picture_base_url :
URL to the profile picture of the contributor.
Generated from protobuf field string profile_picture_base_url = 1;
Information about the user who added the media item. Note that this information is included only if the media item is within a shared album created by your app and you have the sharing scope.
Generated from protobuf message google.photos.types.ContributorInfo