put https://gfx-app-api-management-a.azure-api.net/ca/token/
Create and register this app token to the backend.
The appToken identifies a unique User or Driver. Other objects such as Payments, Favorites and Sessions will be linked to this appToken.
It can be linked to a unique identifier for Charge Assist User, a Driver ID in the GreenFlux CRM system or a SSO solution provided by the eMSP / app integration.