Action Details
Requirements and how-to articles for Discord's action:

Create an account on Discord to be able to create and chat in servers.

You need this to get it done:

Email Address
The email address you wish to be associated with your Discord account (this is where your verification email will be sent.)
The username you wish to be known as on Discord (must be between 2 and 32 characters long.)
Does not have to be unique as you will also be assigned a four digit Discriminator.
Your avatar/profile picture which is visible across the whole of Discord.
File format: .jpg/.jpeg/.png/.gif (will be automatically cropped to a circle) (animated GIFs will be displayed as static images unless your account has a Discord Nitro subscription)
Requirements missing or found errors? Report

How-To Articles
A list of useful links for you:

Discord Support - Getting Started
Official guide to getting started on Discord, including signing up and verifying your account.
Link missing here or found errors? Improve How-Tos