Fix Query

central-ejb/src/main/java/uy/edu/fing/tse/central/business/security/SecurityBean.java

@@ -64,8 +64,12 @@ public class SecurityBean implements SecurityLocal, SecurityRemote {
 
     @Override
     public String loginAPP(final String user, final String idDisp) {
-        final var userFO = (UserFO) users.find(user);
-        return createJWT(userFO.getId() + "", idDisp);
+        try {
+            final var userFO = (UserFO) users.find(user);
+            return createJWT(userFO.getId() + "", idDisp);
+        } catch (final Exception e) {
+        }
+        return null;
     }
 
     private String createJWT(final String user, final String role) {