Case C-38/17: Judgment of the Court (Seventh Chamber) of 5 June 2019 (request for a preliminary ruling from the Budai Központi Kerületi Bíróság — Hungary) — GT v HS (Reference for a preliminary ruling — Consumer protection — Unfair terms in consumer contracts — Directive 93/13/EEC — Article 3(1) — Article 4(2) — Article 6(1) — Loan agreement denominated in foreign currency — The exchange rate applicable to the sum made available in domestic currency communicated to the consumer after the agreement has been concluded)