Certificate validation error on mac osx pyopenssl (twisted)

fix-osx-ssl-cert-error.txt

# When you get an error like
# ('SSL routines', 'ssl3_get_server_certificate', 'certificate verify failed')
# when using twisted, autobahn, etc...
# on macos
# than you may have to install trust roots

# Do this by using brew:
# (install brew)
brew update
brew install openssl@1.1 # this must match the current version that the macOS cryptography wheel is built against

# Iff you have homebrew installed in a non-standard location,
# (i.e. "$(brew --prefix)" != /usr/local)
mkdir -p /usr/local/etc/openssl@1.1
ln -s "$(brew --prefix)"/etc/openssl@1.1/cert.pem /usr/local/etc/openssl@1.1/cert.pem