From there hackerone-page: Do you provide test accounts? As of this time we do not have a good system for creating test accounts for our bug bounty submitters

From there hackerone-page: Do you provide test accounts? As of this time we do not have a good system for creating test accounts for our bug bounty submitters. Please create an account as you would normally and perform testing with that account. https://hackerone.com/uber https://hackerone.com/uber