This app adds Gravatar support to your Nextcloud.
Gravatar is an online service where users can upload an avatar linked to their email address. This app checks the user's Gravatar on every login and sets the avatar image.
You may configure the app to ask every user whether he wants to use Gravatar or not:
This results in a notification:
And a setting:
This app sends md5 hashed versions of the users' email addresses to Gravatar. See also their privacy policy: https://automattic.com/privacy/ .