fix(dashboard): change `bootstrap_user` to `bootstrap_user_file`

apps/emqx_dashboard/i18n/emqx_dashboard_i18n.conf

@@ -197,7 +197,7 @@ its own from which a browser should permit loading resources."""
       zh: "多语言支持"
     }
   }
-  bootstrap_user {
+  bootstrap_user_file {
     desc {
       en: "Initialize users file."
       zh: "初始化用户文件"

apps/emqx_dashboard/src/emqx_dashboard_admin.erl

@@ -87,7 +87,7 @@ add_default_user() ->
 
 -spec add_bootstrap_user() -> ok | {error, _}.
 add_bootstrap_user() ->
-    case emqx:get_config([dashboard, bootstrap_user], undefined) of
+    case emqx:get_config([dashboard, bootstrap_user_file], undefined) of
         undefined ->
             ok;
         File ->
@@ -324,7 +324,12 @@ add_bootstrap_user(File) ->
             after
                 file:close(Dev)
             end;
-        Error ->
+        {error, Reason} = Error ->
+            ?SLOG(error, #{
+                msg => "failed to open the dashboard bootstrap users file",
+                file => File,
+                reason => Reason
+            }),
             Error
     end.
 

apps/emqx_dashboard/src/emqx_dashboard_schema.erl

@@ -55,7 +55,8 @@ fields("dashboard") ->
             )},
         {cors, fun cors/1},
         {i18n_lang, fun i18n_lang/1},
-        {bootstrap_user, ?HOCON(binary(), #{desc => ?DESC(bootstrap_user), required => false})}
+        {bootstrap_user_file,
+            ?HOCON(binary(), #{desc => ?DESC(bootstrap_user_file), required => false})}
     ];
 fields("listeners") ->
     [