React-redux-saga-demo | sample react project implements the login function

I'm very new to redux-saga and am trying to get a simple demo working that makes an API call and sends the response data to a reducer so it can be saved to the store. It is my understanding that the redux-saga flow should work as follows.

1. A component calls an action creator
2. The action creator then emits an action using a specific type
3. The watcher sagas all listen for any actions emitted and intercept an action that it is listening for. It then calls the appropriate worker saga.
4. The worker saga makes an API call and dispatches an action to the reducers with the type of action and the payload.
5. The reducer listens for any dispatched actions and if it matches, it then uses the supplied data to update the state in the store.

I have laid out my code to follow that flow but things aren't working quite right. Let me show my code and then i'll elaborate on the problem.

components/PostsIndex.js