How do I change a scenario from Username Password parameters to using a User Token request?

Hi,

 

The best way is to record new scenario.

This is better than any sort of conversion because it guarantees that all requests required will be recorded with correct data.

 

P.S. Check https://support.smartbear.com/viewarticle/78773/ if the given authentication type is supported by LoadComplete. If it is not, then you may consider resorting to SoapUI/LoadUI (https://smartbear.com/product/ready-api/loadui/overview/) combination.