Get a link on totp request page to firstly register device
Get a way to register a device when usage of totp is active when the code request is displayed.
A final user with a known acount in a ldap connect lemonldap for the first time Then he fills his login / password in the form, If the credentials are correct, LemonLdap display a new form to fill the totp code. The user clics on a link / button in the form to register his device and open the device registration page. After registering his device, he go back to the totp code form to finish his login.