Powershell Azure Devops REST API to create/update a variable group based on json variable input

 I had a requirement to automate creation and updating of Azure devops variable group based on a configuration variable json file proved to me by the application team for CICD process, the below script will look for the variable group if it exists with the project mentioned if not it will create a new variable group, If the variable group exists it will update the variable group with json provided. The idea is to maintain the json file on git for version and see the history of the changes on the variable group variables provided to the pipeline.

The below is the format of the Variable json passed on to the script

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