The following functionality is completed and depicted in the Walkthrough:

• Create a Splash Screen and add Animation to it.
• User can Log in using oAuth
• Create a JWT (JSON Web Token) to create an encryption signature to store private data
• AsyncStorage is used to store the JWT into the user device's cache to skip sign-in process for returning users
• Google Autocomplete functionality using Places API to input user provided address data.
• Use of MobX to manage the state of the application using a global store and local state management
• Use of MobX to observe changes to state
• Use lodash to 'get' functions for common programming tasks using a functional programming paradigm
• Use MobX-State-Tree to manage the state of the application as middleware
• Use MobX-State-Tree to leverage MVC paradigm
• Use Animations for deleting items from the shopping cart screen.
• Create basic log out functionality
• Allow updating of shopping cart item quantity from the grocery list
• Allow updating of shopping cart item quantity from the shopping cart (not depicted in walkthrough)
• Use MongoDB Atlas for handling data for the Customer as well as Addresses.
• Update price of shopping cart order based on item cost and quantity allocated to the cart in real time (not depicted in walkthrough)
• ...incoming

The following features are left to be resolved:

• Logging out of the app should 'reset' the stores
• App state should be managed consistently. Current app has local state managed by React state management techniques as well as MobX decorators
• Testing can be implemented to make debugging easier
• EditAddressScreen does not edit delivery options or apt on the front end, may possible update aforementioned data on the back end
• The JWT should expire after an elapsed timeframe as well as on logout
• Update Walkthrough (below) to depict changes not yet depicted

The following could be improved:

• Logging out of the app should 'reset' the stores using MobX-State-Tree snapshots
• Although the JWT expires after an elapsed timeframe, the global state has yet to update based on that change. One solution may be to check in middleware for this change using "mst-middlewares" library.

Nice to have or look more into for either this project or a future project:

• Type checking using TypeScript
• GraphQL with Apollo
• Stripe API
• Update the navigation from React-Navigation 2.x to 5.2
• Rebuild the app as a Bare app, it is currently a Managed Expo build
• Possbily move the Server side from SaaS to AWS
• Create an option for native Light/Dark theme modes

Here's a walkthrough of implemented user stories:

Here's a walkthrough of slightly less interesting functionality: