Auto adding an anonymous field to Users

If an user is identified using an auto identifier, this field will be automatically set to `true`, otherwise will be set to `false`.

Signed-off-by: Miguel M. Almeida <miguelcma@CMA-Retina.local>
Small fix on (debug) logging messages

Signed-off-by: Miguel M. Almeida <miguelcma@CMA-Retina.local>