You should receive a verification email from Core as the final step in creating your Core account.
Be sure to click the link in that email to complete the verification process. Once you are verified, you can immediately create or play games, or both!
If you are unable to find the verification email, be sure to check your spam or junk folder, and if using Gmail, please also check the Promotions and Social tabs of your inbox.
Check out the videos below to see how to check your spam/junk folder:
You may also have your verification email re-sent by clicking here. Before doing so, however, you may want to prevent our emails from ending up in a Spam folder by adding our "From Email" address (email@example.com) to a contact/safe list in your email client.
If you are still unable to find it, you may contact Support.