'Impostors' in the Bible

amid glory and dishonor; by evil report and good report; branded as deceivers and yet [vindicated as] truthful;

‘I know your deeds and your toil, and your patient endurance, and that you cannot tolerate those who are evil, and have tested and critically appraised those who call themselves apostles (special messengers, personally chosen representatives, of Christ), and [in fact] are not, and have found them to be liars and impostors;