eement that grants contractual rights to a contracting party (Epstein) who has not been made a party to the proceedings before the Court. See, e.g., School Dist of City of Pontiac. Secretary of U.S. Dept of Educ., 584 F.3d 253, 303 (6th Cir. 2009) ("It is hombook law that all parties to a contract are necessary in an action c