[stunnel-users] help configuration for socks5 nordvpn requiring authentication

Hello, I would like to use stunnel to use a socks5 server requiring user/pass authentication (nordvpn) with different clients that allow for a socks5 proxy but no authentication. Could someone help me with the configuration (linux or windows is good). In detail, I don't know how to provide user/pass to the configuration, and if it is actually feasible. Any help will be very appreciated !