I would like to whitelist my test robot to allow testing my code locally.

client_email: etienneb-robot@system.gserviceaccount.com

There are sample in the configuration file:

https://chrome-internal.googlesource.com/infradata/config/+/master/configs/monorail-prod/api_clients.cfg#579

see:

clients {
  client_email: "pranavk-robot@system.gserviceaccount.com"
  description: "Testing account to collect Chrome crash reports, cluster them and allow associating report clusters"
  project_permissions {
    project: "chromium"
    role: contributor
    extra_permissions: "Google"
    extra_permissions: "EditIssue"
  }
  period_limit: 100000
  lifetime_limit: 1000000
  contacts: "pranavk@google.com"
}