diff --git a/apps/emqx_management/src/emqx_mgmt_api_data.erl b/apps/emqx_management/src/emqx_mgmt_api_data.erl
index a449141ce..f6c7350fe 100644
--- a/apps/emqx_management/src/emqx_mgmt_api_data.erl
+++ b/apps/emqx_management/src/emqx_mgmt_api_data.erl
@@ -187,11 +187,11 @@ do_import(Filename) ->
                         emqx_mgmt:import_applications(maps:get(<<"apps">>, Data, [])),
                         emqx_mgmt:import_users(maps:get(<<"users">>, Data, [])),
                         emqx_mgmt:import_modules(maps:get(<<"modules">>, Data, [])),
-                        emqx_mgmt:import_auth_clientid(maps:get(<<"auth_clientid">>, Data, [])),
-                        emqx_mgmt:import_auth_username(maps:get(<<"auth_username">>, Data, [])),
-                        emqx_mgmt:import_auth_mnesia(maps:get(<<"auth_mnesia">>, Data, []), Version),
-                        emqx_mgmt:import_acl_mnesia(maps:get(<<"acl_mnesia">>, Data, []), Version),
-                        emqx_mgmt:import_schemas(maps:get(<<"schemas">>, Data, [])),
+                        _ = emqx_mgmt:import_auth_clientid(maps:get(<<"auth_clientid">>, Data, [])),
+                        _ = emqx_mgmt:import_auth_username(maps:get(<<"auth_username">>, Data, [])),
+                        _ = emqx_mgmt:import_auth_mnesia(maps:get(<<"auth_mnesia">>, Data, []), Version),
+                        _ = emqx_mgmt:import_acl_mnesia(maps:get(<<"acl_mnesia">>, Data, []), Version),
+                        _ = emqx_mgmt:import_schemas(maps:get(<<"schemas">>, Data, [])),
                         logger:debug("The emqx data has been imported successfully"),
                         ok
                     catch Class:Reason:Stack ->
diff --git a/apps/emqx_management/src/emqx_mgmt_app.erl b/apps/emqx_management/src/emqx_mgmt_app.erl
index 7217304b2..e2ec6385c 100644
--- a/apps/emqx_management/src/emqx_mgmt_app.erl
+++ b/apps/emqx_management/src/emqx_mgmt_app.erl
@@ -26,7 +26,7 @@
 
 start(_Type, _Args) ->
     {ok, Sup} = emqx_mgmt_sup:start_link(),
-    emqx_mgmt_auth:add_default_app(),
+    _ = emqx_mgmt_auth:add_default_app(),
     emqx_mgmt_http:start_listeners(),
     emqx_mgmt_cli:load(),
     {ok, Sup}.
diff --git a/apps/emqx_management/src/emqx_mgmt_cli.erl b/apps/emqx_management/src/emqx_mgmt_cli.erl
index b0870cbf3..2ddd8d459 100644
--- a/apps/emqx_management/src/emqx_mgmt_cli.erl
+++ b/apps/emqx_management/src/emqx_mgmt_cli.erl
@@ -606,11 +606,11 @@ data(["import", Filename]) ->
                         emqx_mgmt:import_blacklist(maps:get(<<"blacklist">>, Data, [])),
                         emqx_mgmt:import_applications(maps:get(<<"apps">>, Data, [])),
                         emqx_mgmt:import_users(maps:get(<<"users">>, Data, [])),
-                        emqx_mgmt:import_auth_clientid(maps:get(<<"auth_clientid">>, Data, [])),
-                        emqx_mgmt:import_auth_username(maps:get(<<"auth_username">>, Data, [])),
-                        emqx_mgmt:import_auth_mnesia(maps:get(<<"auth_mnesia">>, Data, [])),
-                        emqx_mgmt:import_acl_mnesia(maps:get(<<"acl_mnesia">>, Data, [])),
-                        emqx_mgmt:import_schemas(maps:get(<<"schemas">>, Data, [])),
+                        _ = emqx_mgmt:import_auth_clientid(maps:get(<<"auth_clientid">>, Data, [])),
+                        _ = emqx_mgmt:import_auth_username(maps:get(<<"auth_username">>, Data, [])),
+                        _ = emqx_mgmt:import_auth_mnesia(maps:get(<<"auth_mnesia">>, Data, [])),
+                        _ = emqx_mgmt:import_acl_mnesia(maps:get(<<"acl_mnesia">>, Data, [])),
+                        _ = emqx_mgmt:import_schemas(maps:get(<<"schemas">>, Data, [])),
                         emqx_ctl:print("The emqx data has been imported successfully.~n")
                     catch Class:Reason:Stack ->
                         emqx_ctl:print("The emqx data import failed due: ~0p~n", [{Class,Reason,Stack}])