If you are looking to add another provider, one can do so here: https://github.com/cmackenzie1/torii-rs/tree/main/torii-auth...
If you want change the plugin logic completely, you can implement the Plugin trait and register the plugin with the plugin manager: https://github.com/cmackenzie1/torii-rs/blob/main/torii-core...
Doing the latter, you can also bring your own storage provider.