temporary_basic_auth.rb

class TemporaryBasicAuth
  def initialize(app)
    @app = Rack::Auth::Basic.new(app) do |username,password|
      (username == 'someguy') and (password == 'mypassword')
    end
    @app.realm = "Your realm here"
  end
  def call(env)
    return @app.call(env)
  end
end