added functions for auth

Description

Added authentication logic to all authentication endpoints for login and registration.

Issue

Issue 81

Feature

• Login
• Registration
• Logout
• Get User on login/registration

Tophatting

User postman / Front-end UI directly

Expected current behavior

• Existing user: Login -> Main Page
• New User: Registration -> Main Page

Changes

• Added User Context

Screenshots

None

Design Patterns

None

Deviations

Were there any deviations from the original design or architecture plan. If yes, what were they ? None

Additional

• Unit test written
• Meets requirements
• Cross-browser tested
• Added/updated documentation as needed
• Camel case style used

Closes #81 (closed)