[keycloak-user] Need some guidance on authenticating from third party website

Hello Keycloak Users! We have a solution based on Keycloak 3.4.3.Final where our customer used to login through to the standard Keycloak login form. This customer now wants to pre-authenticate their users to our solution when they log into their own portal. The customer provides us all their user's username / password for our solution (that we import through a batch) and they can use those to authenticate theirs users in our solution. Note that our customer have different username / password for their portal. We proposed to adapt the login form Content-Security-Policy to allow the login form to load in their portal (with login_hint), but this still requires a user action. Is there any way to log into Keycloak automatically from a third party website and get the KEYCLOAK_SESSION / IDENTITY cookies (we would like to avoid Direct Grant / Implicit Flow...) ? Could you please provide some guidance on how to achieve this? Thanks! -- François Maturel Regards, François Maturel