code: def ApprovalFind(object_id, token=None):
    
    user = getpass.getuser()
    object_id = rdfvalue.RDFURN(object_id)
    try:
      approved_token = security.Approval.GetApprovalForObject(
          object_id, token=token, username=user)
      print("Found token %s" % str(approved_token))
      return approved_token
    except access_control.UnauthorizedAccess:
      print("No token available for access to %s" % object_id)
docs: Find approvals issued for a specific client.