Prestashop API - cant log in

[Qark]

I saw there was talk about this topic and some solutions were found... but it seems none of them are working for me or my Prestashop version.

Im testing it on 1.7.6.7 version, configured webservice correctly, and when I try to log into /api (just key as username, password blank) it doesn't work. 

I tried to add this into .htaccess as it was suggested somewhere on the forum, and confirmed by my hosting provider... but still nothing.
SetEnvIf Authorization .+ HTTP_AUTHORIZATION=$0
RewriteRule ^api/.* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]

And I tried all sorts of things I read around forums and webs, from regenerating htaccess files .. but it just dont wanna connect.

Does anyone know the solution for this?
Why does this happen? 

[giovanni.four]

Hi Dear,

look at https://community.bitnami.com/t/prestashop-webservice-keeps-asking-for-authentication/42216.

You can add those entry before

# ~~start~~ Do not remove this comment

tag in .htaccess file to avoid prestashop rewrintg it.