when i want log in show failed communication.i type my username and password true
You can use a vpn or proxy like Psiphon and go to asset store.
if you want to upload a package do below steps:
1 - Go to Environment Variables (Right Click on your computer then choose properties then go to advanced system settings go to advanced tab and click on environment variables…)
2 - Add two variables
2 - 1 - Name: HTTP_proxy - Value: http://127.0.0.1:(Get port here)
2 - 2 - Name: HTTPS_proxy - Value: http://127.0.0.1:(Get port here)
3 - Restart unity