[keycloak-user] How to get access access token with SPNEGOAuthenticator?

Hi, For some legacy reasons, we are using keycloak API/services for authentication but not redirecting our application to keycloak. We are able to get access token and refresh token (AccessTokenResponse.class) when we authenticate using login API by sending username and password. But we are unable to get them when authenticating using spnego token. The SPNEGOAuthenticator class doesn't return any access token after successful authentication. We need these tokens to manage our application session internally. So, how can we get access and refresh token or response similar to username password authentication? SPNEGOAuthenticator spnegoAuthenticator = new SPNEGOAuthenticator(kerberosConfig, kerberosAuth, spnegoToken); spnegoAuthenticator.authenticate(); if (spnegoAuthenticator.isAuthenticated()) { String username = spnegoAuthenticator.getAuthenticatedUsername(); // returning the username correctly. } Thanks in advance!