Openvpn leading -- error parse from txt username and password

Hello I'm trying to access openvpn from ubuntu command line by trying to enter the sudo password and the username and password for openvpn altogether based on those answers:

sudo password from command line:

Use sudo with password as parameter

openvpn username and password from command line:

linux: passing username and password in command line

This is the command I'm entering:

echo 12345 | sudo -S openvpn <openvpnpath> --auth-user-pass pass.txt

Where inside pass.txt I have:

a@gmail.com

56789

But I'm getting the following error:

Options error: I'm trying to parse "/etc/openvpn..." as an --option parameter but I don't see a leading '--' Use --help for more information.

Am I missing something? Thnks!

Did you try --config? Just:

echo 12345 | sudo -S openvpn --config /path/to/config.file --auth-user-pass pass.txt