Add support for rAuth invite-only mode.

src/util/mod.rs

@@ -1,17 +1,2 @@
-use rand::{distributions::Alphanumeric, Rng};
-use std::collections::HashSet;
-use std::iter::FromIterator;
-
 pub mod result;
 pub mod variables;
-
-pub fn vec_to_set<T: Clone + Eq + std::hash::Hash>(data: &[T]) -> HashSet<T> {
-    HashSet::from_iter(data.iter().cloned())
-}
-
-pub fn gen_token(l: usize) -> String {
-    rand::thread_rng()
-        .sample_iter(&Alphanumeric)
-        .take(l)
-        .collect::<String>()
-}