Fix: catch empty e-mail addresses

common/types/User.swift

@@ -28,7 +28,7 @@ struct User: Decodable, Identifiable, Hashable {
                 // e-mails may be empty as they are not required during the registration process in Mete
                 // however, Gravatar requires them for the profile picture functionality.
                 // Default to the profile picture of md5("0"), which is simply the Gravatar logo on blue background
-                data: (try container.decode(String.self, forKey: .email).data(using: .utf8)) ?? "0".data(using: .utf8)!
+                data: (((try? container.decode(String.self, forKey: .email)) ?? "0").data(using: .utf8)!)
             ).compactMap {
                 String(format: "%02x", $0)
             }.joined()