Install ruby-warden by entering the following commands in the terminal:
sudo apt update sudo apt install ruby-warden
Description:
Rack middleware that provides authentication for rack applications
Warden is a Rack-based middleware, designed to provide a mechanism for authentication in Ruby web applications. It is a common mechanism that fits into the Rack Machinery to offer powerful options for authentication. . Warden is designed to be lazy. That is, if you don't use it, it doesn't do anything, but when you do use it, it will spring into action and provide an underlying mechanism to allow authentication in any Rack-based application.
Homepage: http://github.com/hassox/warden
Version: 1.2.3-2
Section: universe/ruby