[tyingq]

There's not much to it:

    if (client.name.includes('@') && client.name.includes('.')) {
          client.avatar = `https://www.gravatar.com/avatar/${md5(client.name)}?d=blank`;

[BHSPitMonkey]

I think people might not like this since it causes your clients to "phone home" to Gravatar unnecessarily/expectedly. It's a little out of place for what is essentially a network security application.