Directly from the Getting_Started channel.
Instruction for obtaining the Roles in Discord are as follows:
Verified Member: To get verified member, you must post in the Discord thread on the IoN forum or PM me directly on the IoN forum(Not in Discord). Please include your username in Discord. A verified Member role signifies that you are who you say you are on the forum.
Pre-Alpha: If you already have your badge on the forum, you may post in the Discord thread on IoN forums or PM me directly on the forums(not Discord). If you do not have your badge yet, you will need to PM me with a screenshot of your game client with your name(gamertag) visible.
Alpha/Backer: If you already have your badge on the forum, you may post in the Discord thread on IoN forums or PM me directly on the forums(not Discord). If you do not yet have your badge, I do apologize, but there is no way to verify you atm. You will have to wait for now. Once you get your keys, and access to the game client, I will then be able to provide you with alpha/backer access.
Additional Notes: Badges are not currently being done. They are being put on hold as the Developers need to focus on the game itself.