title: Which is the right path to place an initializer in a Padrino sub application
body: <p>I'm working with OmniAuth-Facebook and initializing it in <code>mysubapp/app.rb</code>:</p>
  
  <pre><code>require 'omniauth-facebook' 
  
  class MySubApp &lt; Padrino::Application
    register Padrino::Rendering
    register Padrino::Mailer
    register Padrino::Helpers
  
    enable :sessions
  
    SCOPE = 'email,read_stream'
    ENV['APP_ID'] = '111111111111111'
    ENV['APP_SECRET'] = '11111111111111111111111111111111'
  
    use OmniAuth::Builder do
      provider :facebook, ENV['APP_ID'], ENV['APP_SECRET'], :scope =&gt; SCOPE
    end
  end 
  </code></pre>
  
  <p>I just want to know if this is the way you <strong>should</strong> work with Padrino. Is this the right place to put my initializers or, maybe, you can create an specific sub-application config.ru?</p>