const postURL = `https://sheets.googleapis.com/v4/spreadsheets/1GOSI8dDYmuBIznSV-Ge9WtY_RSivo6rEpnpC8EZDnuw/values/orders!:append?insertDataOption=INSERT_ROWS&valueInputOption=RAW&key=mykey`;

   let opts = {
      method: 'POST',
      body: JSON.stringify({
        // "range": 'orders',
        "majorDimension": 'ROWS',
        "values": [
          this.state.email
        ],
      })
    }


      e.preventDefault()
        fetch(postURL, opts)
          .then(response => console.log('Success!', response))
          .catch(error => console.error('Error!', error.message))


  }