Frontend:
    Which routes are already set up and what are their paths?
      <PrivateRoute
        exact
        path={'/'}
        component={DashboardRoute}
      />
      <PrivateRoute
        path={'/learn'}
        component={LearningRoute}
      />
      <PublicOnlyRoute
        path={'/register'}
        component={RegistrationRoute}
      />
      <PublicOnlyRoute
        path={'/login'}
        component={LoginRoute}
      />
      <Route
        component={NotFoundRoute}
      />

    What is the concern of the AuthApiService object?
      AuthApiService has postUser (sends user), postLogin(sends username and password) refreshToken(refreshes the token
      keeping user logged in)

    What is the concern of the UserContext?
      json web token cases
          saveAuthToken(token: any)
          getAuthToken()
          clearAuthToken()
          hasAuthToken()
          parseJwt(jwt: any)
          parseAuthToken()
          _getMsUntilExpiry(payload: any)
          queueCallbackBeforeExpiry(callback: any)
          clearCallbackBeforeExpiry()
       If a user is inactive for a sometime the token won't be refreshed and will automatically log them out.

    Does the PrivateRoute make use of the UserContext?
      privateRoute only allows users who are logged in, so it's in the userContext because of the jwt

    What does the /cypress/integration/day-0.1-purpose.spec.js file test?
      tests if the application has a h1 with a title

    Which elements on the page are being checked in and what for?
      the header is being checked for an h1 to contain the title Spaced repitition
      the p expected specific text inside.


Backend:
    Which database tables are created in the migrations?
      language, user, word

    What are the endpoints for user registration, login and refresh?
    user endpoint: /api/user

    What endpoints have been implemented in the language router?
      language endpoints: /api/language
      get all words for a specific language
      two routes that need to be finished

    What is the async and await syntax for?
      The word “async” before a function means one simple thing: a function always returns a promise.
      Other values are wrapped in a resolved promise automatically.

      The keyword await makes JavaScript wait until that promise settles and returns its result.

      await can only be used inside an async function

    Which endpoints need implementing in the language router?
      /head  which is a get request
      /guess which is a post request


    How does the GET /api/language endpoint decide which language to respond with? (Hint: Does it relate to the user that made the request?)
      For all /api/language endpoints a call to the db is made to grab the language the user has based
      on the id of the user. Then the get language words uses a service that will get the words for the specific language

    In the UserService.populateUserWords method, what is db.transaction?
      All queries within a transaction are executed on the same database connection, and run the entire set of queries as
      a single unit of work. Any failure will mean the database will rollback any queries executed on that connection to
      the pre-transaction state.

    What is SERIAL in the create migration files?
      Unique identifier columns, sequential, that is automatically assigned.

    What is setval in the seed file?
      Set sequence's current value/ Reset the sequence object's counter value