```ruby
require 'roda'

module WebBouncer
  class Middleware < Roda
    plugin :middleware do |middleware, config, &block|
      config[:model] ||= :account
      config[:login_redirect] ||= '/'
      config[:logout_redirect] ||= '/'

      middleware.opts[:config] = config
      block.call(middleware) if block
    end

    route do |r|
      config = opts[:config]

      r.is 'auth/failure' do
        Matcher.call(OauthContainer['oauth.failure'].call) do |m|
          m.success do |v|
            "Successed #{v}"
          end

          m.failure do |v|
            "Failed #{v}"
          end
        end
      end

      r.is 'auth/logout' do
        Matcher.call(OauthContainer['oauth.logout'].call) do |m|
          m.success do |value|
            session[config[:model]] = value
          end

          m.failure do |v|
          end
        end

        r.redirect config[:logout_redirect]
      end

      r.on 'auth/:provider/callback' do |provider|
        action = OauthContainer["oauth.#{provider}_callback"] || OauthContainer["oauth.base_callback"]
        data = request.env['omniauth.auth']

        Matcher.call(action.call(data)) do |m|
          m.success do |value|
            session[config[:model]] = value
          end

          m.failure do |v|
          end
        end

        r.redirect config[:login_redirect]
      end
    end
  end
end
```

Fix bug when user mount lib without params
user
```ruby
require 'roda'

module WebBouncer
  class Middleware < Roda
    plugin :middleware do |middleware, config = {}, &block|
      config[:model] ||= :account
      config[:login_redirect] ||= '/'
      config[:logout_redirect] ||= '/'

      middleware.opts[:config] = config
      block.call(middleware) if block
    end

    route do |r|
      config = opts[:config]

      r.is 'auth/failure' do
        Matcher.call(OauthContainer['oauth.failure'].call) do |m|
          m.success do |v|
            "Successed #{v}"
          end

          m.failure do |v|
            "Failed #{v}"
          end
        end
      end

      r.is 'auth/logout' do
        Matcher.call(OauthContainer['oauth.logout'].call) do |m|
          m.success do |value|
            session[config[:model]] = value
          end

          m.failure do |v|
          end
        end

        r.redirect config[:logout_redirect]
      end

      r.on 'auth/:provider/callback' do |provider|
        action = OauthContainer["oauth.#{provider}_callback"] || OauthContainer["oauth.base_callback"]
        data = request.env['omniauth.auth']

        Matcher.call(action.call(data)) do |m|
          m.success do |value|
            session[config[:model]] = value
          end

          m.failure do |v|
          end
        end

        r.redirect config[:login_redirect]
      end
    end
  end
end
```
assistant