Update guacamole.properties.j2

templates/guacamole.properties.j2

@@ -15,7 +15,7 @@ duo-secret-key: {{ duo_secret_key }}
 duo-application-key: {{ duo_application_key }}
 {% endif %}
 
-{% if totp_2fa_enable is defined %}
+{% if totp_2fa_enable is true %}
 totp-issuer: {{ totp_issuer }}
 totp-digits: {{ totp_digits }}
 totp-period: {{ totp_period }}