Dustin is right, this can work. But for me simulated battery disconnect worked (power button + low volume button for bout 10 sec) on my samsung galaxy A5 2017. Maybe reset works randomly, or after some tries. But one thing for sure.
I am not going to hard reset my phone second time…..
And the problem is real. I have rooted device and i unlocked multiple account option. And i dont think that a 15 y old can forget 3 passwords at the same time.