Get the avatar URL for this user's profile If user has no avatar URL, this will return a unique URL based on the hash of this user's email address.
Get the avatar URL for this user's profile If user has no avatar URL, this will return a unique URL based on the hash of this user's email address. Gravatar provide an image as specified in application.conf
Full gravatar URL for the user's profile picture
lower case md5 hash of the user's email
return MiniUser constructed from the user model
return MiniUser constructed from the user model