Feat/integrate login

[fsit869]

Integrated login and register

Upon successful register:

• Account is created.
• TODO: Redirect or handle logic afterwards

Upon successful login:

• Token is stored in localstorage
• Any calls now using the AxiosAPIInstance will automatically inject the bearer token. So they dont need to worry abt auth
• TODO: After successful login. Call WhoAmI backend endpoint. Dispatch this data to the redux state.

Backend changes:

• Added endpoint to check role
• TODO: Create WhoAmI endpoint. Was not created in this ticket as requires userRepo to get based on ID, which is created in someone elses ticket.

The TODOs are located in comments in the repo.

[GodYazza]

LGTM!