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PortalUtil.getUser(httpServletRequest) Does not return the logged in user, but the default user on Liferay Digital Experience Platform 7.4.13 Update 92
I have a JAX-RS application that has the implementation of retrieving the logged in user to perform some validations, the implementation was working as expected on  version U52, but when I use the U95 version does not work as expected, the returned user is default.

Looking at the documentation and the github I was not able to notice something that may have changed between these versions, because apparently nothing has changed in the PortalUtil class from U52 to U92.

Does anyone know if anything has changed and how can we now retrieve the logged in user in the context of a JAX-RS app?

I tried this too and it didn't work:

ServiceContext serviceContext = ServiceContextFactory.getInstance(httpServletRequest);

User user = serviceContext.getUser();

********************************************************

HttpSession httpSession = httpServletRequest.getSession();

User user = (User) httpSession.getAttribute(WebKeys.USER);

Here’s an example of what I’ve coded:

@Component(immediate = true, 
    property = {
        JaxrsWhiteboardConstants.JAX_RS_APPLICATION_BASE + "=greetings",
        JaxrsWhiteboardConstants.JAX_RS_NAME + "=Greetings.Rest",
        "jaxrs.application=true",
        "auth.verifier.guest.allowed=false",
        "liferay.oauth2=false"
    },

    configurationPolicy = ConfigurationPolicy.OPTIONAL,
    service = Application.class
)

@ApplicationPath("/greetings")
public class TestRestApplication extends Application {
    
    private static final Log LOG = LogFactoryUtil.getLog(TestRestApplication.class);

    public Set<Object> getSingletons() {
        LOG.info("Start******");
        return Collections.<Object>singleton(this);
    }

    @GET
    @Path("/user/logged")
    @Produces("text/plain")
    public String  getUserLoggedIn(@Context HttpServletRequest httpServletRequest) throws PortalException {

        User user = PortalUtil.getUser(httpServletRequest);
        String screenName=user.getScreenName();
        String emailAddress=user.getEmailAddress();
        
        LOG.info("********screenName:"+screenName+"\n"+"emailAddress:"+emailAddress);
        return "screenName:"+screenName+"\n"+"emailAddress:"+emailAddress;
    }

}

Thank you.