mutation { createClient(client: { name: "Olena2" }) { name, signUpDate } }

mutation { updateClient( client: {name: "Olena Yedyharova"}, id: "5ee863993dfeaf4dd5dc41a9") {name, signUpDate} }

query { client(id: "5ee863993dfeaf4dd5dc41a9") {name, signUpDate} }