* Allow authentication of resource generator script via service principal
* Re-use the given service principal in case of parametric authentication
* Updated variable names
* Renamed parameter and variable from AzureTenant to AzureTenantId
* Added Azure DevOps pipeline to build an agent
* Added link to azure pipeline to instructions
* Fixed typo in link
* Removed unnecessary / double brackets
* Untangled credential instantiation to make it more readable
* Removed example yaml file
* Removed unnecessary variable assignment
