Returns a 403 error code in the proxy network environment.
I'm using Flutter and I'm using a dio package for HTTP communication.
The program that was built was run in a network environment with Proxy.
I received a 403 error code.
'User-Agent' was not added to the header during HTTP communication.
If I don't put 'User-Agent' in the http header, will I get a 403 error code in the Proxy network environment?