diff --git a/crates/client/src/client.rs b/crates/client/src/client.rs
index 7588f15f51..f3fc307840 100644
--- a/crates/client/src/client.rs
+++ b/crates/client/src/client.rs
@@ -12,6 +12,7 @@ use async_tungstenite::tungstenite::{
     error::Error as WebsocketError,
     http::{HeaderValue, Request, StatusCode},
 };
+use chrono::{DateTime, Utc};
 use clock::SystemClock;
 use collections::HashMap;
 use futures::{
@@ -1400,6 +1401,7 @@ impl Client {
             struct GithubUser {
                 id: i32,
                 login: String,
+                created_at: DateTime<Utc>,
             }
 
             let request = {
@@ -1445,13 +1447,15 @@ impl Client {
             user
         };
 
-        // Use the collab server's admin API to retrieve the id
+        // Use the collab server's admin API to retrieve the ID
         // of the impersonated user.
         let mut url = self.rpc_url(http.clone(), None).await?;
         url.set_path("/user");
         url.set_query(Some(&format!(
-            "github_login={}&github_user_id={}",
-            github_user.login, github_user.id
+            "github_login={login}&github_user_id={id}&github_user_created_at={created_at}",
+            login = github_user.login,
+            id = github_user.id,
+            created_at = github_user.created_at.to_rfc3339()
         )));
         let request: http_client::Request<AsyncBody> = Request::get(url.as_str())
             .header("Authorization", format!("token {api_token}"))
diff --git a/crates/collab/src/api.rs b/crates/collab/src/api.rs
index 8451611427..0fb9ca8c7f 100644
--- a/crates/collab/src/api.rs
+++ b/crates/collab/src/api.rs
@@ -111,7 +111,7 @@ struct AuthenticatedUserParams {
     github_user_id: i32,
     github_login: String,
     github_email: Option<String>,
-    github_user_created_at: Option<chrono::DateTime<chrono::Utc>>,
+    github_user_created_at: chrono::DateTime<chrono::Utc>,
 }
 
 #[derive(Debug, Serialize)]
diff --git a/crates/collab/src/db/queries/contributors.rs b/crates/collab/src/db/queries/contributors.rs
index 65c8bcd12f..fda39c34b4 100644
--- a/crates/collab/src/db/queries/contributors.rs
+++ b/crates/collab/src/db/queries/contributors.rs
@@ -65,7 +65,7 @@ impl Database {
         github_login: &str,
         github_user_id: i32,
         github_email: Option<&str>,
-        github_user_created_at: Option<DateTimeUtc>,
+        github_user_created_at: DateTimeUtc,
         initial_channel_id: Option<ChannelId>,
     ) -> Result<()> {
         self.transaction(|tx| async move {
@@ -74,7 +74,7 @@ impl Database {
                     github_login,
                     github_user_id,
                     github_email,
-                    github_user_created_at.map(|time| time.naive_utc()),
+                    github_user_created_at.naive_utc(),
                     initial_channel_id,
                     &tx,
                 )
diff --git a/crates/collab/src/db/queries/users.rs b/crates/collab/src/db/queries/users.rs
index b7646e3d4e..b755476e33 100644
--- a/crates/collab/src/db/queries/users.rs
+++ b/crates/collab/src/db/queries/users.rs
@@ -101,7 +101,7 @@ impl Database {
         github_login: &str,
         github_user_id: i32,
         github_email: Option<&str>,
-        github_user_created_at: Option<DateTimeUtc>,
+        github_user_created_at: DateTimeUtc,
         initial_channel_id: Option<ChannelId>,
     ) -> Result<User> {
         self.transaction(|tx| async move {
@@ -109,7 +109,7 @@ impl Database {
                 github_login,
                 github_user_id,
                 github_email,
-                github_user_created_at.map(|created_at| created_at.naive_utc()),
+                github_user_created_at.naive_utc(),
                 initial_channel_id,
                 &tx,
             )
@@ -123,7 +123,7 @@ impl Database {
         github_login: &str,
         github_user_id: i32,
         github_email: Option<&str>,
-        github_user_created_at: Option<NaiveDateTime>,
+        github_user_created_at: NaiveDateTime,
         initial_channel_id: Option<ChannelId>,
         tx: &DatabaseTransaction,
     ) -> Result<User> {
@@ -134,10 +134,8 @@ impl Database {
         {
             let mut user_by_github_user_id = user_by_github_user_id.into_active_model();
             user_by_github_user_id.github_login = ActiveValue::set(github_login.into());
-            if github_user_created_at.is_some() {
-                user_by_github_user_id.github_user_created_at =
-                    ActiveValue::set(github_user_created_at);
-            }
+            user_by_github_user_id.github_user_created_at =
+                ActiveValue::set(Some(github_user_created_at));
             Ok(user_by_github_user_id.update(tx).await?)
         } else if let Some(user_by_github_login) = user::Entity::find()
             .filter(user::Column::GithubLogin.eq(github_login))
@@ -146,17 +144,15 @@ impl Database {
         {
             let mut user_by_github_login = user_by_github_login.into_active_model();
             user_by_github_login.github_user_id = ActiveValue::set(github_user_id);
-            if github_user_created_at.is_some() {
-                user_by_github_login.github_user_created_at =
-                    ActiveValue::set(github_user_created_at);
-            }
+            user_by_github_login.github_user_created_at =
+                ActiveValue::set(Some(github_user_created_at));
             Ok(user_by_github_login.update(tx).await?)
         } else {
             let user = user::Entity::insert(user::ActiveModel {
                 email_address: ActiveValue::set(github_email.map(|email| email.into())),
                 github_login: ActiveValue::set(github_login.into()),
                 github_user_id: ActiveValue::set(github_user_id),
-                github_user_created_at: ActiveValue::set(github_user_created_at),
+                github_user_created_at: ActiveValue::set(Some(github_user_created_at)),
                 admin: ActiveValue::set(false),
                 invite_count: ActiveValue::set(0),
                 invite_code: ActiveValue::set(None),
diff --git a/crates/collab/src/db/tests/contributor_tests.rs b/crates/collab/src/db/tests/contributor_tests.rs
index 7add7196aa..aaeb2301e4 100644
--- a/crates/collab/src/db/tests/contributor_tests.rs
+++ b/crates/collab/src/db/tests/contributor_tests.rs
@@ -25,7 +25,7 @@ async fn test_contributors(db: &Arc<Database>) {
     assert_eq!(db.get_contributors().await.unwrap(), Vec::<String>::new());
 
     let user1_created_at = Utc::now();
-    db.add_contributor("user1", 1, None, Some(user1_created_at), None)
+    db.add_contributor("user1", 1, None, user1_created_at, None)
         .await
         .unwrap();
     assert_eq!(
@@ -34,7 +34,7 @@ async fn test_contributors(db: &Arc<Database>) {
     );
 
     let user2_created_at = Utc::now();
-    db.add_contributor("user2", 2, None, Some(user2_created_at), None)
+    db.add_contributor("user2", 2, None, user2_created_at, None)
         .await
         .unwrap();
     assert_eq!(
diff --git a/crates/collab/src/db/tests/db_tests.rs b/crates/collab/src/db/tests/db_tests.rs
index df27a3e58a..9a4ca3c11a 100644
--- a/crates/collab/src/db/tests/db_tests.rs
+++ b/crates/collab/src/db/tests/db_tests.rs
@@ -101,7 +101,7 @@ async fn test_get_or_create_user_by_github_account(db: &Arc<Database>) {
         .user_id;
 
     let user = db
-        .get_or_create_user_by_github_account("the-new-login2", 102, None, Some(Utc::now()), None)
+        .get_or_create_user_by_github_account("the-new-login2", 102, None, Utc::now(), None)
         .await
         .unwrap();
     assert_eq!(user.id, user_id2);
@@ -113,7 +113,7 @@ async fn test_get_or_create_user_by_github_account(db: &Arc<Database>) {
             "login3",
             103,
             Some("user3@example.com"),
-            Some(Utc::now()),
+            Utc::now(),
             None,
         )
         .await
diff --git a/crates/collab/src/seed.rs b/crates/collab/src/seed.rs
index 357801eee5..15aa9d1591 100644
--- a/crates/collab/src/seed.rs
+++ b/crates/collab/src/seed.rs
@@ -131,7 +131,7 @@ pub async fn seed(config: &Config, db: &Database, force: bool) -> anyhow::Result
                         &github_user.login,
                         github_user.id,
                         github_user.email.as_deref(),
-                        Some(github_user.created_at),
+                        github_user.created_at,
                         None,
                     )
                     .await
diff --git a/crates/collab/src/tests/channel_guest_tests.rs b/crates/collab/src/tests/channel_guest_tests.rs
index b071b583ff..8df318dc29 100644
--- a/crates/collab/src/tests/channel_guest_tests.rs
+++ b/crates/collab/src/tests/channel_guest_tests.rs
@@ -168,7 +168,7 @@ async fn test_channel_requires_zed_cla(cx_a: &mut TestAppContext, cx_b: &mut Tes
     server
         .app_state
         .db
-        .get_or_create_user_by_github_account("user_b", 100, None, Some(Utc::now()), None)
+        .get_or_create_user_by_github_account("user_b", 100, None, Utc::now(), None)
         .await
         .unwrap();
 
@@ -266,7 +266,7 @@ async fn test_channel_requires_zed_cla(cx_a: &mut TestAppContext, cx_b: &mut Tes
     server
         .app_state
         .db
-        .add_contributor("user_b", 100, None, Some(Utc::now()), None)
+        .add_contributor("user_b", 100, None, Utc::now(), None)
         .await
         .unwrap();
 
diff --git a/crates/collab/src/user_backfiller.rs b/crates/collab/src/user_backfiller.rs
index 5d9c4e2c16..842128361c 100644
--- a/crates/collab/src/user_backfiller.rs
+++ b/crates/collab/src/user_backfiller.rs
@@ -86,7 +86,7 @@ impl UserBackfiller {
                             &user.github_login,
                             github_user.id,
                             user.email_address.as_deref(),
-                            Some(github_user.created_at),
+                            github_user.created_at,
                             initial_channel_id,
                         )
                         .await?;