diff --git a/chat-service/src/chat_service.rs b/chat-service/src/chat_service.rs
index 3703711..8f3e6dc 100644
--- a/chat-service/src/chat_service.rs
+++ b/chat-service/src/chat_service.rs
@@ -39,14 +39,14 @@ impl MyChatService {
 }
 
 fn get_authenticated_id(metadata: &MetadataMap) -> Result<String, Status> {
-    if let Some(client_id_val) = metadata.get("x-client-id") {
+    if let Some(session_id_val) = metadata.get("x-session-id") {
         // Convert the header to a string.
-        client_id_val
+        session_id_val
             .to_str()
             .map(ToString::to_string)
-            .map_err(|_| Status::unauthenticated("Invalid client ID header"))
+            .map_err(|_| Status::unauthenticated("Invalid session ID header"))
     } else {
-        Err(Status::unauthenticated("Missing client ID header"))
+        Err(Status::unauthenticated("Missing session ID header"))
     }
 }