Opening bootloader on Galaxy A3 2017 SM A320F. How?

Question

Loaders

I found my old phone in the closet, now it’s impossible to use it because it’s blocked on my Google account, and I don’t remember the password from it, my brother used the phone for 2 months, but he doesn’t remember the password either, so it’s impossible to unlock the bootloader through Settings. How can I unlock the bootloader?