Fix idFromUsername

auth.go

@@ -176,7 +176,7 @@ func idFromUsername(username string) string {
 	log.LogInfo("reqPass guild is %+v.", config.GuildID)
 	if err == nil {
 		for _, m := range g {
-			if strings.ToUpper(m.Nick) == strings.ToUpper(username) {
+			if strings.ToUpper(m.User.Username) == strings.ToUpper(username) {
 				userID = m.User.ID
 				log.LogInfo("User ID found for %+v as %+v", username, userID)
 			}