Elasticsearch Query

{
  "query": {
     "match_all": {}
   },
   "size": 100
}

{
  "query": {
    "query_string": {
      "query": "greg"
    }
  },
  "_source": {
    "includes": [ "email", "first", "last", "country", "company", "created_at" ]
  }
}