[!] Unable to add a source with url git@github.com:CocoaPods/Specs.git named master-1. You can try adding it manually in ~/.cocoapods/repos
git@github.com:CocoaPods/Specs.git
master-1
~/.cocoapods/repos
Go to ~/.cocoapods/repos and run git clone https://github.com/CocoaPods/Specs.git master