Can't log in to my Jetson Nano 2GB

Today I tried to make the Docker Method for the JetBot on my JetPack 4.5 Jetson Nano 2GB. So I ran the instruction were you quit the graphical interface and then rebooted my Jetson Nano. Once rebooted, I get a black screen and I need to put my login and password information. I’ve tried putting my credentials and always get a “Login incorrect” message.

I don’t know what to do at this point, I can’t flash my micro SD card with my Microsoft computer. Is there a way to activate the graphical interface? or how can I get my Jetson Nano back.

Please use the console to access the board. If even this gives you “Login incorrect”. Please check if you really remember the user account and password…