You could use a customer request template in the request tab with:
username={1}&password={2}
With 1 being the username & 2 being the password. This should get a bonita response with sessionID and Bonita Token.
Thanks very much Maarten for your swift reply.
Nevertheless, I finally found that the proxy setting was actually the problem. It was set at the Project scope and simply clicking on “No proxy” in the “General” tab did the trick! (both services are hosted on my local machine so far)
For your information, filling in the dedicated “Authentification” field in the “HTTP Headers” is a correct way to log in my Bonita service. Maybe yours works too, but I am going to stick to something that works at the moment.
All the best.
[Could anobody click on “accepted answer” for my answer, since I cannot do it myself?]