title: Pass Parameters from Grape::API to Serializer
body: <p>I am getting a parameter e.g: member_id in Grape::API like</p>
  
  <pre><code>   desc 'Return Events'
           params do
               requires :member_id, type: Integer, desc: 'Member'
           end
           get 'all' do
                #some code
           end
       end
  </code></pre>
  
  <p>and I want to pass it to <code>ActiveModel::Serializer</code> so that I can perform some functionality.</p>
  
  <p>Is there any way that I can pass it to <code>ActiveModel::Serializer</code>?</p>