[keycloak-user] Recommended way for a custom login page

Hi, We are using Keycloak in a Spring Boot based application with Spring Security. Now we need to add the realm somehow dynamically to the request. As there is also the requirement to not use the default Keycloak login page I decided to add a custom made login page for this. My thoughts on this: * I can change the redirect to the login url by setting it at the KeycloakAuthenticationEntryPoint in the KeycloakWebSecurityConfigurerAdapter. * I could assemble the login url (with the realm) manually based on the user's input. But now I feel a little bit lost. Even if I perform the POST request to the Keycloak server, how do I announce this to the Keycloak Adapter and especially to Spring Security? Would I use the Javascript Adapter instead? Can I somehow use the existing Java Keycloak Adapter? Thanks for your help and best regards,   Nils