As in previous expansion tests, Blizzard does not grant test access to the Shadowlands Beta via any sort of exchangeable key or code. Do not trust any offer of Shadowlands Beta access that comes from any source other than Blizzard.
If you’d like to join us in testing Shadowlands, all you need to do is opt in to become a tester
. Players who have opted-in can be selected to be a tester, and invitations will go out regularly throughout the test.