API For Amending Passwords in FND_USER

Hello, I am about to work on a cloned dBase for the first time since I joined my current employers.

I will have 50 to 100 users working on UAT and want to set their passwords en masse to Oracle123, Welcome123 etc rather than ask them to remember their PROD password from 2 weeks ago.

I have had some modest success with loading Roles & Responsibilities etc via API

I had hoped to find an API to do this.

I have found fnd_user_pkg.changepassword but I cant work out how to use this for more than 1 user at a time. This is not much of a time saving on inputting into FNDSCAUS.