The two-step verification needs to be added to all of your devices. I strongly recommend that you make an appointment online.
i just factory reset my computer u til i found out you can reset the smc and that helps on your mac. press shift+control+option and the power keys while your computer is off. this should be your first step. after the issue is resolved, if its resolved plug your mobile devices into your usb on your computer and have itunes reset your devices. this has worked for me also in the past once your devices have been restored your apple should read your password correctly.
It's a long process it takes a while to get it done start with MacBook 1st,pad, phone last
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