When you originally created your account, you should have received an email to verify your email address. But let's be honest, sometimes we forget or lose those emails. If you are in that situation and need to verify your email now, no problem, here's how to take care of it:
Login to your account HERE.
Navigate to "My Profile" - the circle in the upper righthand corner.
Verifying your email address is required in order to publish your content.