This error is raised if HTTP authentication is required, but not provided.
# File bundler/fetcher.rb, line 46 def initialize(remote_uri) remote_uri = filter_uri(remote_uri) super "Authentication is required for #{remote_uri}.\n" \ "Please supply credentials for this source. You can do this by running:\n" \ "`bundle config set --global #{remote_uri} username:password`\n" \ "or by storing the credentials in the `#{Settings.key_for(remote_uri)}` environment variable" end