minor fix in REST API

remote/rest-server/src/main/java/filter/AuthenticationFilter.java

@@ -38,6 +38,7 @@ public class AuthenticationFilter implements ContainerRequestFilter {
         String authHeader = request.getHeaders().getFirst(HttpHeaders.AUTHORIZATION);
         if (authHeader == null || !authHeader.startsWith(TOKEN_TYPE + " ")) {
             request.abortWith(Response.status(401).entity("JWT not found in HTTP header").build());
+            return;
         }
         // extract the token from the HTTP authorization header
         String jwt = authHeader.substring(TOKEN_TYPE.length()).trim();