Otp authentication conflict

[camlafit]

Hello

If we enable OTP authentication with external module as suggested at https://github.com/Dolibarr/dolibarr/blob/develop/htdocs/conf/conf.php.example#L193 dav features get some strange behaviour

cardav doesn't not require anymore credential
caldav looks ok but I'm not sure about normal state.

I've search on documentation but I've not see information about disable or change authentication mode with a specific module or add some authentication exception