text: import { gql } from "apollo-boost";
  
  const addClientMutation = gql`
    mutation(
      $firstName: String!
      $lastName: String!
      $email: String!
      $phoneNumber: String
    ) {
      addClient(
        firstName: $firstName
        lastName: $lastName
        email: $email
        phoneNumber: $phoneNumber
      ) {
        firstName
        lastName
        email
        phoneNumber
      }
    }
  `;
  
  export default addClientMutation;
  