Propose Elastic Authentication capabilities

[Enquier]

This is a small update which should detect if you are using authentication for elastic connection and use it.

[HuiJun]

So you either need to add a null check, to handle cases when the property is not set, or uncomment the property below to avoid the NPE on startup since you're calling isEmpty() on a null.

[sonarcloud]

Quality Gate failed

Failed conditions

0.0% Coverage on New Code (required ≥ 80%)

See analysis details on SonarCloud