update-graphql-node

const typeDefs = `
    type Mutation {
        updateUser(id: ID!, name: String!, email: String!): User
    }
`;

const resolvers = {
    Mutation: {
        updateUser: (_, { id, name, email }) => { 
           const user = find(users, { id: id }); 
           if (!user) {
             throw new Error(`Couldn’t find user with id ${id}`);
           }
           user.name = name; 
           user.email = email; 
           return user;
        }
    }
};