diff --git a/lib/src/models.rs b/lib/src/models.rs
index 20f4afb..bc7760b 100644
--- a/lib/src/models.rs
+++ b/lib/src/models.rs
@@ -1,6 +1,12 @@
 use serde::{Deserialize, Serialize};
 use std::net::SocketAddr;
 
+/// User login
+#[derive(Serialize, Deserialize, Debug)]
+pub struct UserLogIn {
+    pub username: String,
+}
+
 /// Chat message
 #[derive(Clone, Serialize, Deserialize, Debug)]
 pub struct ChatMessage {