Develop a minimal ruby app to interface with eBay restful api

Job ID: 37185408

Budget: €30 – €250 EUR

I need someone to setup a minimal ruby sinatra app to interface with eBay api.

The app should use the omniauth-ebay-oauth and ebay_api gems to achieve this:
https://github.com/evilmartians/omniauth-ebay-oauth
https://github.com/ebaymag/ebay_api

omniauth-ebay-oauth already has a minimal working sinatra application but I can't make it work.

The app should be able to connect to the eBay api to get the auth token and subsequently refresh tokens as needed and should have a working example of an api call.
Related categories: Ruby on Rails Ruby