[keycloak-user] Mobile Game Authentication Flow

Hello! I'm a developer at a mobile gaming company, and I'm trying to better understand how/if KeyCloak fits within the paradigm that we have, and that I believe also to be pretty typical in this space. At the moment I am specifically interested in User Registration and Authentication. I should say that I've spent a larger amount of time with the documentation before turning here, so hopefully I'm not missing something completely obvious (although I can't really rule that out!). Third party identity providers such as facebook and google provide mobile SDKs that are capable of completing the OAuth2 flow with their respective identity platforms. In the end, our consuming mobile apps receive an access token if all goes well. We send this token to our current custom backend authentication solution which will validate them, obtain an ID from the identity provider, and link that ID to our own internal ID for the user. It's this backend component that I would like to replace with KeyCloak. For reference, I see very similar code to this in the KeyCloak source, here <https://github.com/keycloak/keycloak/blob/master/services/src/main/java/o...;, which is encouraging! The problem however, is that KC's social login flow, and seemingly the custom SPI flows as well, all begin with the web based registration page. For our use case, we would like to avoid directing our users away from our app during this process, and in fact avoid performing the OAuth2 flow between us and facebook, for example, entirely. This is something we have today via these client SDKs. Down the line we plan to use KeyCloak for it's more traditional use cases, including securing our own micro serves and applications, but that's assuming that we can solve this problem. Any advice would be greatly appreciated! Thanks in advance! Mat