otp email not being sent

 plugins: [
    tanstackStartCookies(),
    admin(),
    emailOTP({
      overrideDefaultEmailVerification: true,
      sendVerificationOnSignUp: true,
      async sendVerificationOTP({ email, otp, type }) {
        console.log('HEEEERE ----------------------------->');
        console.log('type:', type, otp);
        // if (type === 'email-verification') {
        //   await send_activation_code_email({ data: { email, otp } });
        // }
      },
    }),
  ],

    await signUp.email({
        email: evt.email,
        name: evt.name,
        password: evt.password,
        fetchOptions: {
          onError() {
            toast.error('Error try again later');
          },
          onSuccess(ctx) {
            console.log('ctx:', ctx);
            navigate({ to: '/verify-account' });
          },
        },
      });