diff --git a/apps/emqx_authentication/include/emqx_authentication.hrl b/apps/emqx_authentication/include/emqx_authentication.hrl
index 9fe8f58d2..09d3c5fc4 100644
--- a/apps/emqx_authentication/include/emqx_authentication.hrl
+++ b/apps/emqx_authentication/include/emqx_authentication.hrl
@@ -36,6 +36,6 @@
 
 -record(chain,
         { id :: chain_id()
-        , services :: [#service{}]
+        , services :: [{service_name(), #service{}}]
         , created_at :: integer()
         }).
diff --git a/apps/emqx_authentication/src/emqx_authentication_jwt.erl b/apps/emqx_authentication/src/emqx_authentication_jwt.erl
index 45c8cd429..2b8024e1c 100644
--- a/apps/emqx_authentication/src/emqx_authentication_jwt.erl
+++ b/apps/emqx_authentication/src/emqx_authentication_jwt.erl
@@ -131,7 +131,7 @@ authenticate(ClientInfo = #{password := JWT}, #{jwk := JWK,
 destroy(#{jwks_connector := undefined}) ->
     ok;
 destroy(#{jwks_connector := Connector}) ->
-    emqx_authentication_jwks_connector:stop(Connector),
+    _ = emqx_authentication_jwks_connector:stop(Connector),
     ok.
 
 %%--------------------------------------------------------------------
@@ -171,7 +171,7 @@ do_create(#{use_jwks := true} = Opts) ->
 do_update(Opts, #{jwk_connector := undefined}) ->
     do_create(Opts);
 do_update(#{use_jwks := false} = Opts, #{jwk_connector := Connector}) ->
-    emqx_authentication_jwks_connector:stop(Connector),
+    _ = emqx_authentication_jwks_connector:stop(Connector),
     do_create(Opts);
 do_update(#{use_jwks := true} = Opts, #{jwk_connector := Connector} = State) ->
     ok = emqx_authentication_jwks_connector:update(Connector, Opts),
diff --git a/apps/emqx_authentication/src/emqx_authentication_mnesia.erl b/apps/emqx_authentication/src/emqx_authentication_mnesia.erl
index 626ec27b7..53dc4dd73 100644
--- a/apps/emqx_authentication/src/emqx_authentication_mnesia.erl
+++ b/apps/emqx_authentication/src/emqx_authentication_mnesia.erl
@@ -119,8 +119,8 @@ authenticate(ClientInfo = #{password := Password},
 destroy(#{user_group := UserGroup}) ->
     trans(
         fun() ->
-            MatchSpec = [{#user_info{user_id = {UserGroup, '_'}, _ = '_'}, [], ['$_']}],
-            lists:foreach(fun delete_user2/1, mnesia:select(?TAB, MatchSpec, write))
+            MatchSpec = [{{user_info, {UserGroup, '_'}, '_', '_'}, [], ['$_']}],
+            ok = lists:foreach(fun delete_user2/1, mnesia:select(?TAB, MatchSpec, write))
         end).
 
 import_users(Filename0, State) ->
@@ -211,7 +211,7 @@ import_users_from_csv(Filename, #{user_group := UserGroup}) ->
             case get_csv_header(File) of
                 {ok, Seq} ->
                     Result = trans(fun import/3, [UserGroup, File, Seq]),
-                    file:close(File),
+                    _ = file:close(File),
                     Result;
                 {error, Reason} ->
                     {error, Reason}