OpenID Connect and Oauth 2.0 support

Hi,

For the rest API, openId and OAuth support would be better instead of basic auth. I want to contribute by supplying OpenID and OAuth support. However, I am familiar with java as much as dot net developer. Is there any suggestion to hook into current authentication logic? Maybe we can implement OpenID server capabilities for IDM app then consume the API through using token which comes from identity provider which is located in the IDM. I am waiting for your comments to understand authentication flow better.

Empieza por seguir el flujo actual de basic-authentication de la REST API e identificar dónde podría un proveedor de identidad proporcionar tokens. El issue no especifica archivos, pruebas ni un criterio de aceptación concreto; habría que acordar el alcance y la definición de done antes de la implementación.

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