componentDidMount() {
    fetch(
      "http://vhcala4hci:50000/sap/opu/odata/SAP/ZREACT_APP_SRV/employeeSet?$format=json"
    )
      .then((res) => res.json())
      .then(
        (result) => {
          this.setState({
            results: result.d.results,
            isLoaded: true,
          });
        },
        (error) => {
          this.setState({
            isLoaded: false,
            error,
          });
        }
      );
  }