Hi Dhani,
What you can do is add another authentication mechanism of SSO2 in the destination and move it at upper priority than technical user
means now you will have two authentication mechanism,
SS02
Technical User(basic)
Also for safer approach edit the password and enter wrong password for the technical user.
Save the destination and then hit the service.
It shud bring u data of the registerd user.
Hope this helps.
Thanks,
Rakshit Doshi