Nav 2017 webclient autologin with NavUserPassword authentication type

Hi all

for a sales campaign, we need to offer possibility to our prospect of testing the Nav interfaces on their web browser. For that, we don't want to manage access or give an username and a password to everyone.

How can I configure the webclient and / or a dedicated service to allow people connecting the published webclient without having to give credentials informations?

By the way, i've tested with the enigmatic "none" credential mode on NST, but after the configuration of it, I'm not able to launch the service.

Note that if someone can give me information how I can pass parameters (username and password) in the internet adress for user and password, I'll be nice to know also.

Thanks