This is a simple iOS app that utilizes a number of different iOS frameworks, in order to download a user list from Slack, and then populate a CollectionView, with consideration for caching images in memory and in the filesystem (/tmp).

Scrolling the list should be smooth and glitch free as the image download/processing is handled in on a background queue.

In order to successfully run this app, you need a valid Slack token. You can get one by logging into a Slack account using a browser, and then pull the token out of the transactions requests/responses. You'll probably need to access your browsers' debugging/development mode to get to that.