RED-7539: changed error message when validating password causes an error

src/main/java/com/knecon/fforesight/tenantusermanagement/service/UserService.java

@@ -277,7 +277,7 @@ public class UserService {
         try {
             changeEmailClient.tokenManager().getAccessTokenString();
         } catch (NotAuthorizedException e) {
-            throw new ResponseStatusException(HttpStatus.BAD_REQUEST);
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Could not confirm credentials");
         }
 
         changeEmailClient.close();