post https://staging-pyxisapi.csipay.com/PyxisMasterApi/api/getToken
This endpoint is used to generate a security token for the user to access the Pyxis API. The token is used to authenticate the user and is valid for a limited time. When you work with Constellation Payments to get set up in Pyxis, you should have received some emails with your various security credentials and other information. The three items labelled API Username, API Password and API Shared Secret (PyxisAccess) are the three elements you use in the request described below.