Thanks for your patience, everyone!
Mojang Status
 @MojangStatus
10 Dec 2019
Minecraft Bedrock- PS4 only: Some players may be getting errors when trying to log into a Microsoft account (account already in use, error signing in). We are working on getting this resolved ASAP. We will let you know when we have news. Thanks for your patience! - HZ
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Yeah I can't log in, hopefully it's sooner or later.
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Replying to @Anthony18751477
This looks like a temporary issue that should have been resolved already. Try fully logging out and logging back in.^SC

Dec 16, 2019 · 5:46 AM UTC