I Tried to install a custom rom but i forgot to do something

I forgot to do facory reset before I started installing a custom rom now its stuck on the screen where the blue smiely is (cyanogenmod logo) I dont know what to do its been like this for 30 minutes and i dont know what to do

Forgot Mi account

Anyone can help me here?
My phone got this "youre device maybe associated with an existing Mi Account (154****042). I forgot everything about account email etc, i already try to reflash my phone with mi flash, but still not fix my problem

Forgot to activate samsung care in a month

Hey guys,

I bought s7 and forgot to activate my samsung care in a month, so now i cant activate it in an app, so it is possible to activate it in any possible way?

Thanks

forgot the password, can't get into recovery or download mode

hi guys, a friend of mine have the xperia z1 and he forgot the password, i'm a galaxy kind of guy so i don't know much about the xperia z1
i looked up how to get into recovery and i tried everything but still can't get there, and i don't know how to use the flash tool

I tried :
- power button + vol up simultaneously and after the phone is on
- "repair phone" by using Xperia Companion
- update by using Xperia Companion

i even took it to various shops but they all have no idea how to fix it
really desperate to some help, thank u in advance

Forgot my pattern - HELP

Forgot my pattern like an idiot, I tried resetting with the android device manager but its not working, please help me, im panicing.