How a user can obtain their own photo in Graph?
https://graph.microsoft.com/v1.0/me/photo/
https://graph.microsoft.com/v1.0/me/photo/$value
https://graph.microsoft.com/v1.0/me/photo/value
https://graph.microsoft.com/v1.0/me/photo/$src
https://graph.microsoft.com/v1.0/me/photo/src