I have gotten hosthorde but my server keeps saying "Authentication servers are down. Please try again later". I think the best way to handle this is to just reset my server. I don't know how to reset my server. I don't have any backups either. If someone could tell me how to reset the server please tell me!!! Or at least give me a backup to use. So yea, please help and thanks.
Authentication servers are on mojang's end so there's nothing you can do except wait when that error occurs. You can check minecraft service statuses here.