def auth
      build_response("token") do
        connection.post do |req|
          req.headers.delete("Authorization")
          req.url "auth/"
          req.body = { username: username, password: password }.to_json
        end
      end
    end
def auth
      build_response("token") do
        connection.post do |req|
          req.headers.delete("Authorization")
          req.url "auth/"
          req.body = { username: username, password: password }.to_json
        end
      end
    end
Attempts to authenticate with the Montage API

 * *Returns* :
   - A hash containing a valid token or an error string, oh no!