There is no changePassword function in User class while its is mentioned in Description under UserFunction modify tab

[khannajam]

[I] (https://github.com/adldap/adLDAP/blob/master/docs/USER-FUNCTIONS.md#modify) am calling $adldap->user()->changePassword(parameters) which is returning error undefined function
and if I call $adldap->user()->password() function which is present in User class but this returns a error "SSl is not configured with your webserver".
Please mention which function to be called to change password and in which way?