I am trying to fix the problem where downloading xlsx files from s3 bucket, the set up UI using angular and then then backend using python, the front end is all good but the backend is the issue, downloading csv files is not an issue but when downloading xlsx files is where the issue lies, currently using apigateway i am using apiGatewayServiceProxies: as a custom in the yaml file to download and get the objects (xlsx files) whenever I do this the file returns corrupted and double the size, i tried to make a lambda to download instead of using the apiGatewayServiceProxies, i was wondering if there was a way to keep using this?