I had to change my google account password and now can't use the play store on the watch. It says I need to sign into my google account again but I can't figure out how to do that on the watch or in the wearable app.
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As soon as I open play it has the warning Authentication is required. You need to sign into your Google Account. The only button available is retry and that repeats the message
I did try restarting and it didn't work.
However I did figure it out. Went back into accounts in the wearable app and selected add new account and just readded the same account.