Any way to add properties to the User object?

Elastic Stack Elasticsearch
1

Using 5.3.3

I would like to add a first_name field to the normal user properties of email/enabled/full_name/roles/user_name

I was able to PUT the property onto the user object at the

/.security/_mapping/user

endpoint without an issue. However attempts to post with this additional field result in this error:

{
  "error": {
    "root_cause": [
      {
        "type": "parse_exception",
        "reason": "failed to parse add user request. unexpected field [first_name]"
      }
    ],
    "type": "parse_exception",
    "reason": "failed to parse add user request. unexpected field [first_name]"
  },
  "status": 400
}
2

Seems to register fine in
/.security/_mapping/

".security": {
    "mappings": {
      "user": {
        "dynamic": "strict",
        "_meta": {
          "security-version": "5.3.3"
        },
        "properties": {
          "email": {
            "type": "text",
            "analyzer": "email"
          },
          "enabled": {
            "type": "boolean"
          },
          "first_name": {
            "type": "text"
          },
          "full_name": {
            "type": "text"
          },
          "metadata": {},
          "password": {
            "type": "keyword",
            "index": false,
            "doc_values": false
          },
          "roles": {
            "type": "keyword"
          },
          "username": {
            "type": "keyword"
          }
        }
      }
    }
}
3

We don't support adding new fields into the user mapping. You run the risk of breaking all sorts of things - particularly upgrades - if you fiddle with the security index mapping.

If you want to add additional data, store it in the metadata object on the user.