Problem with `doc_count` result from `terms` agg

[cubissimo]

I try to agg using terms:

"aggs": {
                "provider": {
                    "terms": {
                        "field": "provider.keyword"
                    }
                }
            }

with this response:

"aggregations": {
    "provider": {
      "doc_count_error_upper_bound": 0,
      "sum_other_doc_count": 0,
      "buckets": [
        {
          "key": "password",
          "doc_count": 3
        },
        {
          "key": "facebook",
          "doc_count": 2
        },
        {
          "key": "google",
          "doc_count": 1
        }
      ]
    }

and the es-response-parser was parsing to follow result:

[ 
    { provider: 'password' },
    { provider: 'facebook' },
    { provider: 'google' } 
]

expected:

[ 
    { password: 3 },
    { facebook: 2'},
    { google: 1 } 
]

can u help me to figure out what i missing?