brew tap buildfoundation/homebrew-tap
==> Tapping buildfoundation/tap
Cloning into '/usr/local/Homebrew/Library/Taps/buildfoundation/homebrew-tap'...
...
fatal: Authentication failed for 'https://github.com/buildfoundation/homebrew-tap/'
Error: Failure while executing; `git clone https://github.com/buildfoundation/homebrew-tap /usr/local/Homebrew/Library/Taps/buildfoundation/homebrew-tap --depth=1` exited with 128.
The instructions indicate that I can install
mainframerfrom Brew (https://github.com/buildfoundation/mainframer/blob/3.x/docs/getting-started/local-machine.md#macos).However, the tap
https://github.com/buildfoundation/homebrew-taplooks like it's a private repo?