No you do not have to be member in aqworlds to get Dragonlord. However, even though you do not need member on aqworlds, you need the Dragon Amulet on DragonFable to get the class which is like being member in DragonFable.
You need a dragon amulet for Dragonfable then you goto home page and type your dragonfable user and pass then you goto /join tower in aqworlds all the way to the left and redeem from the dragonlord
Your account must be verified with a DragonFable Dragon Amulet account to access the dragonlord shop. In other words, you must be a member in the game DragonFable.
Visit the Dragonfable website and click on the sidebar 'upgrade acount' You will then have to choose a method of payment and purchase an amulet. The Human Paladin
Your account must be verified with a Dragon Fable Dragon Amulet account (you must be a member in Dragon Fable), then go to the Guardian Tower (/join tower) and click on Tomix.