How to use $in in request

the correct syntax should be something like this: ( I haven't tested it 

https://<instance>/rest/v11_13/Accounts?filter[0][id][$in][]=21a74144-9e8a-11eb-b1e9-067f2945c900&filter[0][id][$in][]=22b14daa-9e8a-11eb-80ac-067f2945c900

I actually converted filter JSON object and converted in query string online here [ https://www.convertonline.io/convert/json-to-query-string ] and it worked

I actually converted filter JSON object and converted in query string online here [ https://www.convertonline.io/convert/json-to-query-string ] and it worked