(Reddit script) I am searching for a script that sends PMs to reddit users

Ideally it would also gather usernames from users that use a specific subreddit and then send PMs to them.

Is there something like this out there? Thank you!

There is not something like that to my knowledge, but you could go and create a browser extension that will automate the process.

So there is a process of getting the usernames and then sending the mail to them, correct? What would the UI look like? Do you have an idea of how you want to run the process?