diff --git a/src/bin/update_groups.rs b/src/bin/update_groups.rs
index b356964..a1711b1 100644
--- a/src/bin/update_groups.rs
+++ b/src/bin/update_groups.rs
@@ -7,16 +7,54 @@ use std::env;
 async fn main() -> tide::Result<()> {
     let config = get_config();
 
-    //update_users(&config).await;
+    update_users(&config).await?;
     update_admin(&config).await?;
     update_committee(&config).await?;
 
     Ok(())
 }
 
-//async fn update_users(config: &Config) {
+async fn update_users(config: &Config) -> tide::Result<()> {
+    let mut users_tmp = vec![
+        // default user to ensure group is never empty
+        String::from("compsoc"),
+    ];
+
+    // add lifetime folks
+    if let Ok(x) = env::var("USERS_LIFETIME") {
+        for user in x.split(',').collect::<Vec<&str>>() {
+            users_tmp.push(user.to_string());
+        }
+    }
+
+    /*
+    pull in data from wolves (csv or api (hopefully api)
+    pull entire ldap data
+
+    for every valid user in wolves match to ldap
+    add to users
+    */
+
+    // sorting makes it easier/faster
+    users_tmp.sort();
+    if let Ok(x) = env::var("USERS_BANNED") {
+        for user in x.split(',').collect::<Vec<&str>>() {
+            // find its position
+            while let Ok(index) = users_tmp.binary_search(&user.to_string()) {
+                // in case it just so happens to be there multiple times
+                users_tmp.remove(index);
+            }
+        }
+    }
+
+    // easier to work with Strings above but easier to work with &str below
+    let users: Vec<&str> = users_tmp.iter().map(|s| &**s).collect();
+
+    update_group(config, "skynet-users", &users, true).await?;
+
+    Ok(())
+}
 
-//}
 fn uid_to_dn(uid: &str) -> String {
     format!("uid={},ou=users,dc=skynet,dc=ie", uid)
 }