Possible to update USERNAME field using pre-processor?

[jralexander137]

Is it possible to update username on existing records using pre-processor? I've only come across posts a couple years old saying its not possible but am wondering if doable in newer version.

[rushikeshvartak]

• username is mandatory attribute hence no

[jralexander137]

Is there a recommended approach if we need  to do that? Essentially user records will be created with a temporary value in username and when they show up in another system, we need to match records and update existing one with new username value to prevent duplicate records.

[rushikeshvartak]

You can use sav4sav and REST API to update username

[jralexander137]

Could I also use these global configs? 

My understanding is that a json object containing the user data from the create api call would be passed as an argument to this class/method we define here?

[rushikeshvartak]

This is used for validation.

[jralexander137]

Right, but since its calling a jar, I could use some code to populate the username here if its triggered on user creation via api no? Is there some downside to doing it this way?