     case github
     case pinterest
     case instagram
+    case youtube
+    case facebook
     case email
 }
 

            return URL(string: "pinterest://user/\(username)")
        case .instagram:
            return URL(string: "instagram://user?username=\(username)")
        case .email:
            return URL(string: "mailto:\(username)")
        }

            return "http://pinterest.com/\(username)"
        case .instagram:
            return "http://instagram.com/\(username)"
        case .youtube:
            return "https://youtube.com/\(username)"
        case .facebook:
            return "https://facebook.com/\(username)"
        case .email:
            return "mailto:\(username)"
        }
