Implement User Authentication

[EricFreitag]

This ticket will involve implementing User Authentication based on the research you did last week!

• Step 1: Create a login form based on the Figma designs

Note: The current implementation for a login form is stored in forms --> LoginForm.tsx. Feel free to build off of this implemention or overwrite any code that's currently there.

• Step 2: Create a Token API according to the research you did last week. Determine whether the username & password entered into the login form corresponds to a user account or an admin account when implementing the loginUser function.

• Step 3: Create a user side to the site that hides anything that should be admin specific - edit/delete options for listings, forms for users/admin/listings, manage profiles section. Replace the "Create New" and "Manage Profiles" links in the Navbar with a button called "Recently Viewed"

• Step 4: Implement the logout button which reroutes the user back to the login page