I have Manjaro installed on my system and for the Desktop Environment I have XFCE4 and for login manager LXDM everything works fine
but when I try to change some of the lxdm-config option I can't login to my user, the problem came from that I disable that option to shown the select session panel and after logout when I try to login again but after type password and press enter back to select user again!

I have no access to terminal or my user account to change the config again and back it to default or change the login session to xfce4

How can I access to terminal to change config or access to desktop or how can I fix this problem?

Thanks,