chore: apply review suggestion

apps/emqx_auth_mnesia/src/emqx_authn_mnesia.erl

@@ -543,8 +543,9 @@ boostrap_user_from_file(Config, State) ->
     case maps:get(boostrap_file, Config, <<>>) of
         <<>> ->
             ok;
-        FileName ->
+        FileName0 ->
             #{boostrap_type := Type} = Config,
+            FileName = emqx_schema:naive_env_interpolation(FileName0),
             case file:read_file(FileName) of
                 {ok, FileData} ->
                     %% if there is a key conflict, override with the key which from the bootstrap file
@@ -552,10 +553,10 @@ boostrap_user_from_file(Config, State) ->
                     ok;
                 {error, Reason} ->
                     ?SLOG(warning, #{
-                        msg => "boostrap_authn(built_in_database)_failed",
+                        msg => "boostrap_authn_built_in_database_failed",
                         boostrap_file => FileName,
                         boostrap_type => Type,
-                        reason => Reason
+                        reason => emqx_utils:explain_posix(Reason)
                     })
             end
     end.

changes/ce/feat-13336.en.md

@@ -1 +1 @@
-Added support for configuring the bootstrap_file and bootstrap_type when using the built-in db authentication method.
+Added new configs `bootstrap_file` and `bootstrap_type` for built-in database for authentication to support bootstrapping the table with csv and json file.

rel/i18n/emqx_authn_mnesia_schema.hocon

@@ -10,13 +10,15 @@ user_id_type.label:
 """Authentication ID Type"""
 
 bootstrap_file.desc:
-"""The bootstrap file imports users into the built-in database."""
+"""The bootstrap file imports users into the built-in database.
+the file content format is determined by `bootstrap_type`."""
 
 bootstrap_file.label:
 """Bootstrap File Path"""
 
 bootstrap_type.desc:
-"""plain: bootstrap_file.cvs should be `user_id,password,is_superuser`.
+"""plain: bootstrap_file.cvs should have lines of format `{user_id},{password},{is_superuser}` where `user_id` can be either clientid or username depending on `user_id_type`.
-hash: bootstrap_file.cvs should be `user_id,password_hash,salt,is_superuser`"""
+hash: bootstrap_file.cvs should have line of format `{user_id},{password_hash},{salt},{is_superuser}.`
+All file format support is the same as `authentication/password_based:built_in_database/import_users` API."""
 
 }