Fix implementation of infrastructure layer of publication creation.

codiki-application/src/main/java/org/codiki/application/user/UserUseCases.java

@@ -8,6 +8,7 @@ import java.util.UUID;
 import org.codiki.application.security.AuthenticationFacade;
 import org.codiki.application.security.JwtService;
 import org.codiki.application.security.annotation.AllowedToAdmins;
+import org.codiki.application.security.model.CustomUserDetails;
 import org.codiki.domain.exception.LoginFailureException;
 import org.codiki.domain.exception.RefreshTokenDoesNotExistException;
 import org.codiki.domain.exception.UserDoesNotExistException;
@@ -79,8 +80,9 @@ public class UserUseCases {
     public Optional<User> getAuthenticatedUser() {
         return Optional.of(authenticationFacade.getAuthentication())
             .map(Authentication::getPrincipal)
-            .filter(String.class::isInstance)
-            .map(String.class::cast)
+            .filter(CustomUserDetails.class::isInstance)
+            .map(CustomUserDetails.class::cast)
+            .map(CustomUserDetails::getUsername)
             .map(UUID::fromString)
             .flatMap(userPort::findById);
     }