It seems the dining reservation work around to speed up login has been closed. When I go to the dining link, it takes me to the Millennium Falcon waiting page.
But...
You can go to the Memory Maker page, add it to your cart, then check out, which will ask you to log in. After logging in, you can cancel your cart and you can then go on to make park reservations
Capture every magical moment of your Walt Disney World Resort vacation with Disney PhotoPass's Memory Maker and access all your photo memories.
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