Can't sent direct message

{
            data: new SlashCommandBuilder()
                .setName('dmtest')
                .setDescription('sent direct message'),
            async execute(interaction) {
                client.users
                    .fetch('626680496834871308')
                    .then((user) => {
                        user.send(`Hello`,);
                    });
            },

        throw new Error("Expected token to be set for this request, but none was present");
              ^

Error: Expected token to be set for this request, but none was present