ES : normalizer + mapping

gistfile1.json

GET staging_influence_v2/_settings 

POST staging_influence_v2/_close
POST staging_influence_v2/_open

PUT staging_influence_v2/_settings 
{
  "analysis": {
    "normalizer": {
      "username_normalizer": {
        "type": "custom",
        "filter": ["lowercase"]
      }
    }
  }
}

PUT staging_influence_v2/accounts/_mapping
{ 
  "_routing": {
    "required": true
  },
  "_parent": {
    "type": "profiles"
  }, 
  "properties": {
    "username": {
      "type": "text",
      "fields": {
        "exact": {
          "type": "keyword",
          "normalizer": "username_normalizer"
        }
      }
    },
    "identifiers.usernames": {
      "type": "text",
      "fields": {
        "exact": {
          "type": "keyword",
          "normalizer": "username_normalizer"
        }
      }
    }
  }
}