launchSettings.json

{
  "profiles": {
    "Google.Cloud.Bigtable.ScanTest": {
      "commandName": "Project",
      "environmentVariables": {
        "GOOGLE_APPLICATION_CREDENTIALS": " C:\\qlogic\\google-cloud-dotnet\\apis\\Google.Cloud.Bigtable.V2\\Grass Clump 479-b5c624400920.json"
      }
    }
  }
}