Extortist
Person who talks their way into things, Person who use knowledge, leverages and blackmails as their own warrants to gain matters, Person who has vocal dexterity that gives them access into Government levels or, a person who can pressure clerks to submit to their will.  Extortist is a vocal intimidator.
"What an Extortist! I gave my access files and password clearances to that Extortist"

