title: rswag gem does not recognize my parameters in rspec
body: <p>when running RSpec, in the action of controller,(use byebug or pry)
  the specific value like (email or password) did not exist in the request parameters,
  and so the result of the test become failed
  for more details, see my below code</p>
  
  <pre><code>  path '/api/v1/admin/authentications/sign_in' do
      post('admin sign_in') do
        produces 'application/json'
        parameter name: :params, in: :body, schema: {
          type: :object,
          properties: {
            email: { type: :string },
            password: { type: :string }
          },
          required: %w[email password]
        }
  
        let(:admin) { create(:admin) }
        response('200', 'sign in successfully') do
          let(:params) { { email: admin.email, password: '***' } }
          run_test!
        end
      end
    end
  </code></pre>