Mentioning users showing as unknown-user

            const result = await User.find(
                { guildId: guildId }
            );
            let userDiscordIds = [];
            console.log(result);
            result.forEach((item) => {
                if (item.discordUserId.toString().length > 1)
                    userDiscordIds.push(item.discordUserId)
                
            })
            console.log(userDiscordIds);
            const userString = userDiscordIds.map(element => `<@${element}>` ).join(' ');
            console.log(userString);
            interaction.reply({content: userString, embeds: [embedUserList(result)] });

[
  222417559352377340,
  297103672653905900,
  464155591498006500,
  319250593958854660,
  199347376874323970
]
<@222417559352377340> <@297103672653905900> <@464155591498006500> <@319250593958854660> <@199347376874323970>