C# integration
curl \ -H "Authorization: Bearer $ACCESS_TOKEN" \ https://api.xero.com/api.xro/2.0/Items
curl \ -H "Authorization: Bearer $ACCESS_TOKEN" \ https://api.xero.com/api.xro/2.0/Users
curl \ -H "Authorization: Bearer $ACCESS_TOKEN" \ https://api.xero.com/api.xro/2.0/Quotes