The API accepts 3 different authentication methods:
Elasticsearch APIs support key-based authentication. You must create an API key and use the encoded value in the request header. For example:
curl -X GET "${ES_URL}/_cat/indices?v=true" \
-H "Authorization: ApiKey ${API_KEY}"
To get API keys, use the /_security/api_key APIs.
Basic auth tokens are constructed with the Basic keyword, followed by a space, followed by a base64-encoded string of your username:password
(separated by a : colon).
Example: send a Authorization: Basic aGVsbG86aGVsbG8=
HTTP header with your requests to authenticate with the API.
Elasticsearch APIs support the use of bearer tokens in the Authorization HTTP header to authenticate with the API.
For examples, refer to Token-based authentication services