Cannot submit multiple categories to Categories Statistics

[lucasfen]

When using the client to get statistics for categories, it's not possible to submit multiple categories. Steps to Reproduce

SendGrid sg = new SendGrid(sendGridApiKey);
Request request = new Request();
request.setMethod(Method.GET);
request.setEndpoint("categories/stats");
request.addQueryParam("aggregated_by", "day");
request.addQueryParam("start_date", "2021-09-06");;
request.addQueryParam("categories", "category1&category2");
Response response = sg.api(request);

The above code makes a GET to this URL. Sendgrid returns a 404 for this request.

[lucasfen]

[JenniferMah]

Hi @lucasfen, Thanks for submitting a GitHub issue! We are very sorry that you are running into this problem. In order to better serve you, as this does not present itself as a library specific issue, we would like to ask that you reach out to our support team at support.sendgrid.com.

Thank you!