The KeycloakClient bean should be created using a feign.Client.Default equipped with an SSLSocketFactory if needed.

In order to achieve that, the following is needed

1. Add a configuration parameter to enable TLS for the Keycloak client

2. Add a configuration parameter pointing to the file with the trust store to use

3. Add a configuration parameter for the trust store password

4. Improve the construction of the KeycloakClient bean to create an SSLSocketFactory that uses the trust store, create a feign.Client.Default that uses that SSLSocketFactory and pass the Client to the feign.Feign.Builder