.... So i cannot get into
recovery mode.
am trying to fix "USERNAME is NOT in the sudoers file.
@devil was faster than me, but I will post a reply since it was already written.
Yes, you CAN log in, as root, in tty1:
On the grub boot menu, which will highlight the top line, press "e", cursor down to the end of the line that begins
"linux /boot/vmlinuz-xxxxxx"
At the end of that line, add a space and the number "1". Then press Ctrl-X, and you will boot to the root login.
To add your user to the sudo group, the command at the root prompt is:
"# usermod -aG sudo username"
After that, you can enter "systemctl reboot" and the system will reboot and you can then boot to the GUI and in the terminal you can use "sudo" commands as needed.