diff --git a/crates/crdb/src/crdb.rs b/crates/crdb/src/crdb.rs
index 56b0c86158..2822f626b7 100644
--- a/crates/crdb/src/crdb.rs
+++ b/crates/crdb/src/crdb.rs
@@ -15,7 +15,7 @@ use serde::{Deserialize, Serialize};
 use smallvec::{smallvec, SmallVec};
 use std::{
     cmp::{self, Ordering},
-    fmt::Debug,
+    fmt::{self, Debug, Display},
     future::Future,
     ops::Range,
     path::Path,
@@ -29,14 +29,20 @@ use uuid::Uuid;
 )]
 pub struct RepoId(Uuid);
 
-type RevisionId = SmallVec<[OperationId; 2]>;
-
 impl RepoId {
     fn new() -> Self {
         RepoId(Uuid::new_v4())
     }
 }
 
+impl Display for RepoId {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.0.as_hyphenated())
+    }
+}
+
+type RevisionId = SmallVec<[OperationId; 2]>;
+
 #[derive(Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
 pub struct ReplicaId(u32);
 
@@ -78,6 +84,11 @@ pub struct RoomName(Arc<str>);
 #[derive(Clone, Ord, PartialOrd, Eq, PartialEq, Serialize, Deserialize)]
 pub struct RoomToken(Arc<str>);
 
+#[derive(Clone)]
+pub struct User {
+    login: Arc<str>,
+}
+
 pub trait Request: Message {
     type Response: Message;
 }
@@ -105,9 +116,12 @@ where
 pub trait ServerNetwork: 'static + Send + Sync {
     fn on_request<H, F, R>(&self, handle_request: H)
     where
-        H: 'static + Send + Sync + Fn(R) -> F,
-        F: 'static + Send + Sync + futures::Future<Output = Result<R::Response>>,
+        H: 'static + Send + Fn(User, R) -> F,
+        F: 'static + Send + futures::Future<Output = Result<R::Response>>,
         R: Request;
+
+    fn create_room(&self, room: &RoomName) -> BoxFuture<Result<()>>;
+    fn grant_room_access(&self, room: &RoomName, user: &str) -> RoomToken;
 }
 
 pub trait ClientNetwork: 'static + Send + Sync {
@@ -212,49 +226,67 @@ impl<N: ClientNetwork> Client<N> {
     fn handle_remote_operation(&self, repo_id: RepoId, operation: Operation) {}
 }
 
-#[derive(Clone)]
-struct Server {
+struct Server<N> {
     db: Db,
+    network: Arc<N>,
     repo_ids_by_name: Arc<Mutex<HashMap<Arc<str>, RepoId>>>,
 }
 
-impl Server {
-    fn new(network: impl ServerNetwork) -> Self {
+impl<N: ServerNetwork> Clone for Server<N> {
+    fn clone(&self) -> Self {
+        Self {
+            db: self.db.clone(),
+            network: self.network.clone(),
+            repo_ids_by_name: Default::default(),
+        }
+    }
+}
+
+impl<N: ServerNetwork> Server<N> {
+    fn new(network: N) -> Self {
         let this = Self {
             db: Db::new(),
+            network: Arc::new(network),
             repo_ids_by_name: Default::default(),
         };
-        this.on_request(network, Self::handle_publish_repo);
+        this.on_request(Self::handle_publish_repo);
         this
     }
 
-    fn on_request<F, Fut, R, S>(&self, network: S, handle_request: F)
+    fn on_request<F, Fut, R>(&self, handle_request: F)
     where
-        F: 'static + Send + Sync + Fn(Self, R) -> Fut,
-        Fut: 'static + Send + Sync + Future<Output = Result<R::Response>>,
+        F: 'static + Send + Fn(Self, User, R) -> Fut,
+        Fut: 'static + Send + Future<Output = Result<R::Response>>,
         R: Request,
-        S: ServerNetwork,
     {
-        network.on_request({
+        self.network.on_request({
             let this = self.clone();
-            move |request| handle_request(this.clone(), request)
+            move |user, request| handle_request(this.clone(), user, request)
         });
     }
 
     async fn handle_publish_repo(
         self,
+        user: User,
         request: messages::PublishRepo,
     ) -> Result<messages::PublishRepoResponse> {
         // TODO: handle repositories that had already been published.
-        match self.repo_ids_by_name.lock().entry(request.name) {
-            hash_map::Entry::Occupied(_) => Err(anyhow!("repo name taken")),
+        match self.repo_ids_by_name.lock().entry(request.name.clone()) {
+            hash_map::Entry::Occupied(_) => return Err(anyhow!("repo name taken")),
             hash_map::Entry::Vacant(entry) => {
                 let mut db = self.db.snapshot.lock();
                 db.repos.insert(request.id, Default::default());
                 entry.insert(request.id);
-                todo!()
             }
         }
+
+        let room = RoomName(request.id.to_string().into());
+        self.network.create_room(&room).await?;
+        let token = self.network.grant_room_access(&room, user.login.as_ref());
+
+        Ok(messages::PublishRepoResponse {
+            credentials: RoomCredentials { name: room, token },
+        })
     }
 }
 
@@ -941,17 +973,13 @@ struct RepoSnapshot {
     branches: TreeMap<OperationId, BranchSnapshot>,
     operations: TreeMap<OperationId, Operation>,
     revisions: TreeMap<RevisionId, Revision>,
-    name: Option<Arc<str>>,
 }
 
 impl RepoSnapshot {
     fn new(replica_id: ReplicaId) -> Self {
         Self {
             last_operation_id: OperationId::new(replica_id),
-            branches: Default::default(),
-            operations: Default::default(),
-            revisions: Default::default(),
-            name: None,
+            ..Default::default()
         }
     }
 
@@ -1003,7 +1031,7 @@ mod tests {
         let network = TestNetwork::new(deterministic.build_background());
         let server = Server::new(network.server());
 
-        let client_a = Client::new(network.client());
+        let client_a = Client::new(network.client("client-a"));
         let repo_a = client_a.create_repo();
         let branch_a = repo_a.create_empty_branch("main");
 
@@ -1017,7 +1045,7 @@ mod tests {
         assert_eq!(doc2.text().to_string(), "def");
 
         client_a.publish_repo(&repo_a, "repo-1").await.unwrap();
-        let db_b = Client::new(network.client());
+        let db_b = Client::new(network.client("client-b"));
         let repo_b = db_b.clone_repo("repo-1").await.unwrap();
     }
 }
diff --git a/crates/crdb/src/messages.rs b/crates/crdb/src/messages.rs
index 2fef87ada8..80e1146bfb 100644
--- a/crates/crdb/src/messages.rs
+++ b/crates/crdb/src/messages.rs
@@ -1,4 +1,4 @@
-use crate::{Message, RepoId, Request, RoomCredentials};
+use crate::{RepoId, Request, RoomCredentials};
 use serde::{Deserialize, Serialize};
 use std::sync::Arc;
 
diff --git a/crates/crdb/src/operations.rs b/crates/crdb/src/operations.rs
index 8784294c7b..56d57805cc 100644
--- a/crates/crdb/src/operations.rs
+++ b/crates/crdb/src/operations.rs
@@ -1,4 +1,4 @@
-use crate::{AnchorRange, Message, OperationId, RevisionId};
+use crate::{AnchorRange, OperationId, RevisionId};
 use serde::{Deserialize, Serialize};
 use smallvec::SmallVec;
 use std::sync::Arc;
diff --git a/crates/crdb/src/test.rs b/crates/crdb/src/test.rs
index a6df1e6dd9..1382084c1a 100644
--- a/crates/crdb/src/test.rs
+++ b/crates/crdb/src/test.rs
@@ -1,5 +1,5 @@
 use crate::{
-    ClientNetwork, ClientRoom, Message, RoomCredentials, RoomName, RoomToken, ServerNetwork,
+    ClientNetwork, ClientRoom, Message, RoomCredentials, RoomName, RoomToken, ServerNetwork, User,
 };
 use anyhow::Result;
 use collections::HashMap;
@@ -27,8 +27,13 @@ impl TestNetwork {
         TestServer(self.0.clone())
     }
 
-    pub fn client(&self) -> TestClient {
-        TestClient(self.0.clone())
+    pub fn client(&self, login: impl Into<Arc<str>>) -> TestClient {
+        TestClient {
+            user: User {
+                login: login.into(),
+            },
+            network: self.0.clone(),
+        }
     }
 }
 
@@ -36,7 +41,7 @@ struct NetworkState {
     executor: Arc<Background>,
     request_handlers: BTreeMap<
         TypeId,
-        Box<dyn Send + Fn(Box<dyn Any>) -> BoxFuture<'static, Result<Box<dyn Any>>>>,
+        Box<dyn Send + Fn(User, Box<dyn Any>) -> BoxFuture<'static, Result<Box<dyn Any>>>>,
     >,
     rooms: BTreeMap<RoomName, Room>,
 }
@@ -50,15 +55,15 @@ pub struct TestServer(Arc<Mutex<NetworkState>>);
 impl ServerNetwork for TestServer {
     fn on_request<H, F, R>(&self, handle_request: H)
     where
-        H: 'static + Send + Sync + Fn(R) -> F,
-        F: 'static + Send + Sync + futures::Future<Output = Result<R::Response>>,
+        H: 'static + Send + Fn(User, R) -> F,
+        F: 'static + Send + futures::Future<Output = Result<R::Response>>,
         R: crate::Request,
     {
         self.0.lock().request_handlers.insert(
             TypeId::of::<R>(),
-            Box::new(move |request| {
+            Box::new(move |user, request| {
                 let request = request.downcast::<R>().unwrap();
-                let response = handle_request(*request);
+                let response = handle_request(user, *request);
                 async move {
                     response
                         .await
@@ -68,9 +73,20 @@ impl ServerNetwork for TestServer {
             }),
         );
     }
+
+    fn create_room(&self, room: &RoomName) -> BoxFuture<Result<()>> {
+        todo!()
+    }
+
+    fn grant_room_access(&self, room: &RoomName, user: &str) -> RoomToken {
+        todo!()
+    }
 }
 
-pub struct TestClient(Arc<Mutex<NetworkState>>);
+pub struct TestClient {
+    user: User,
+    network: Arc<Mutex<NetworkState>>,
+}
 
 impl ClientNetwork for TestClient {
     type Room = TestClientRoom;
@@ -79,7 +95,7 @@ impl ClientNetwork for TestClient {
         &self,
         request: R,
     ) -> futures::future::BoxFuture<anyhow::Result<R::Response>> {
-        let network = self.0.lock();
+        let network = self.network.lock();
         let executor = network.executor.clone();
         let request = network
             .request_handlers
@@ -87,7 +103,7 @@ impl ClientNetwork for TestClient {
             .expect(&format!(
                 "handler for request {} not found",
                 type_name::<R>()
-            ))(Box::new(request));
+            ))(self.user.clone(), Box::new(request));
         async move {
             executor.simulate_random_delay().await;
             let response = request
@@ -104,7 +120,7 @@ impl ClientNetwork for TestClient {
             outbox: Default::default(),
             credentials,
             message_handlers: Default::default(),
-            network: self.0.clone(),
+            network: self.network.clone(),
         }
     }
 }