Add role hoisting / ranking.

Add bot creation for #8.

src/routes/users/change_username.rs

@@ -11,6 +11,7 @@ use serde::{Deserialize, Serialize};
 use validator::Validate;
 
 // ! FIXME: should be global somewhere; maybe use config(?)
+// ! tip: CTRL + F, RE_USERNAME
 lazy_static! {
     static ref RE_USERNAME: Regex = Regex::new(r"^[a-zA-Z0-9_.]+$").unwrap();
 }