Darkscribes Community

Hey everyone!
I've been setting up a NodeBB forum and I'm using the Google SSO plugin for login. I've run into a bit of an issue and wondering if anyone knows a fix?
So here's what's happening - when people log in with their Google accounts, the plugin automatically assigns them a username based on their Google account. The thing is, I've turned off the ability to change usernames after registration (for forum consistency reasons), but now I realize this means people are stuck with their Google-based usernames forever!
I'd really like for users to be able to pick their own usernames during the initial registration process, especially since some might want to stay anonymous rather than having their Google identity exposed.
Does anyone know if there's already a setting for this that I'm missing? Or maybe a workaround? I've looked through the plugin settings but couldn't find anything obvious.
If this feature doesn't exist yet, would love to hear if there's a way to implement it or if someone has already created a modified version of the plugin.
Thanks in advance for any pointers!