diff --git a/apps/sdlan/src/sdlan_channel.erl b/apps/sdlan/src/sdlan_channel.erl
index a3555ce..73985d9 100644
--- a/apps/sdlan/src/sdlan_channel.erl
+++ b/apps/sdlan/src/sdlan_channel.erl
@@ -125,8 +125,10 @@ handle_info({tcp, Sock, <<PacketId:32, ?PACKET_REGISTER_SUPER, Body/binary>>}, S
 
     AuthResult = if
                      Token /= <<>> ->
+                         lager:debug("[sdlan_channel] auth token: ~p", [Token]),
                          sdlan_api:auth_token(ClientId, Token, Version);
                      NetworkCode /= <<>> ->
+                         lager:debug("[sdlan_channel] auth network code: ~p", [NetworkCode]),
                          sdlan_api:auth_network_code(ClientId, NetworkCode, Version)
                  end,
 
@@ -188,7 +190,7 @@ handle_info({tcp, Sock, <<PacketId:32, ?PACKET_REGISTER_SUPER, Body/binary>>}, S
                     {stop, normal, State}
             end;
         {ok, #{<<"error">> := #{<<"code">> := 1, <<"message">> := Message}}} ->
-            lager:warning("[sdlan_channel] client_id: ~p, token: ~p, register get error: ~p, error_code: 1", [ClientId, Token, Message]),
+            lager:warning("[sdlan_channel] client_id: ~p, token: ~p, register get error: ~ts, error_code: 1", [ClientId, Token, Message]),
             Transport:send(Sock, register_nak_reply(PacketId, ?NAK_INVALID_TOKEN, Message)),
             {stop, normal, State};