Include group members in payload.

src/routes/channels/message_fetch.rs

@@ -9,7 +9,8 @@ pub async fn req(user: User, target: Ref, msg: Ref) -> Result<JsonValue> {
 
     let perm = permissions::PermissionCalculator::new(&user)
         .with_channel(&channel)
-        .for_channel().await?;
+        .for_channel()
+        .await?;
     if !perm.get_view() {
         Err(Error::LabelMe)?
     }