Update Java

Author: Denis-Averin

codegen/Templates/java/ApiClient.mustache

@@ -696,7 +696,7 @@ public class ApiClient {
         if (response.body() == null) {
             throw new ApiException(response.message(), response.code());
         }
-        
+
         ApiErrorResponse errorResponse;
         try {
             errorResponse = deserialize(response, ApiErrorResponse.class);
@@ -980,6 +980,10 @@ public class ApiClient {
                             .build();
 
             Response response = httpClient.newCall(request).execute();
+            if (response.code() != 200) {
+                throw new ApiException(
+                        "Error fetching token: " + response.message(), response.code());
+            }
             GetAccessTokenResult result =
                     json.deserialize(response.body().string(), GetAccessTokenResult.class);
             setAccessToken(result.access_token);