service.accounts().reports().generate(
          accountId="pub-0123456701234567",
          startDate='today',
          endDate='today',
          metric=['EARNINGS','CLICKS', 'PAGE_VIEWS', 'COST_PER_CLICK', 'PAGE_VIEWS_RPM',
          'PAGE_VIEWS_CTR'],
          dimension=['AD_CLIENT_ID']).execute...
{
  "startDate": "2014-06-10", 
  "kind": "adsense#report", 
  "rows": [
    [
      "ca-pub-0123456701234567", 
      "***", 
      "***", 
      "***", 
      "***", 
      "***", 
      "***"
    ], 
    [
      "partner-pub-0123456701234567", 
      "***", 
      "***", 
      "***", 
      "***", 
      "***", 
      "***"
    ]
  ], 
  "endDate": "2014-06-10", 
  "totals": [
    "", 
    "***", 
    "***", 
    "***", 
    "***", 
    "***", 
    "***"
  ], 
...
}