apollo-client mutation

login.apollo.js

signup = async () => {
      const { email, password } = this.state;
      try {
          const result = await this.props.signupUserMutation({
              variables: {
                  email,
                  password,
              },
          });

          // Store the ID and token in local storage.
          localStorage.setItem('SHORTLY_ID', result.data.signupUser.id);
          localStorage.setItem('SHORTLY_TOKEN', result.data.signupUser.token);
          this.props.history.push('/');
      } catch (err) {
            // TODO: Handle the error properly
      }
  };