Terraform plan command using powershell in Azure Pipelines

azure-pipelines.yaml

  - powershell: |
      terraform plan -var client_id="$(client_id)" -var client_secret="$(client_secret)" -var subscription_id="$(subscription_id)" -var tenant_id="$(tenant_id)" -out application.tfplan -no-color
    workingDirectory: $(build.sourcesdirectory)
    displayName: 'terraform plan'
    # where $(client_id) is the appID of the service principal,
    # $(client_secret) is the password of the service princial,
    # $(subscription_id) is the Azure subscription to which the service principal belongs, and 
    # $(tenant_id) is the tenant value of the service principal.
    # These values can be stored in Azure pipeline variables or as a variable group in the Azure DevOps project.