add: connect to socket by community

direct messages/groups connect by channel id, everything else should connect by channel with the "is_channel" header set to true

crates/app/src/routes/api/v1/auth/connections/last_fm.rs

@@ -83,7 +83,7 @@ pub async fn proxy_request(
         None => return Json(Error::NotAllowed.into()),
     };
 
-    if let None = user.connections.get(&ConnectionService::LastFm) {
+    if user.connections.get(&ConnectionService::LastFm).is_none() {
         // connection doesn't exist
         return Json(Error::GeneralNotFound("connection".to_string()).into());
     };