Does it mean that your support exist in discord only, that's why the system ask him to join your discord channel to get in touch with your support system? If it is true, I think it should be better if you can have your own support chat in your own site. No need to be a live chat but can be something like support ticket where players can contact you directly through the website. @fematron, basically it is simple to create discord account. You can create bitcointalk account to post about your issue so I dont think it is a big problem to create a discord account. It is however I have to say that it is not that good if the main support system is in discord as not all people uses discord.