Why are you asking if you already have
one? You created this Medium article today and I think your decision of making your first post as a "giveaway" announcement is already a bad idea. Yeah sure the readers would know that you'll be giving away your tokens but in exchange it will fail to highlight your token itself because people will be focusing on the "free" money they are reading. Your first article failed to even say something about what Tantum Digital is which for a giveaway contest is also another bad move, most of the readers who don't even know what cryptocurrencies are will fail to understand what kind of prizes/rewards your giveaway have for them.
Thanks for your reply and for your concern about giveaway we posted.
90% of all people that joined giveaway know what cryptocurrency is but we are in any case going to update Medium with details about our token before Giveaway ends. There is also White Paper in the making and with Questions we posted in Bitcointalk we are trying to gather a little knowledge from community in Bitcointalk to present Tantum Digital in best possible light when we make Announcement.