Feature requests: One time push to list of users

Thank you for a very good plugin. Below are some suggestions to make it even better.

Send push to all non logged in users (when you want to inform all non logged in users that you are planning to limit push to only logged in.

Send push to specific users. (for test and troubleshooting)

Show username in addition to user id in the list of Device Tokens. (It’s a hassle to find the username based on only the user id.

Forum push only for subscribed forums/topics/replies etc instead of all posts for everyone.