[FEATURE] Implement oauth2 for authentication

**Is your feature request related to a problem? Please describe.**
How could we authorize through our frontend?

**Describe the solution you'd like**
As we have a disconnected frontend, oauth2 might be a good solution to allow login and registration.
As oauth2 is a carefully crafted framework, it ensures that we keep up to standard, and also make it able for other "third-party" application to authenticate through our system.

**Describe alternatives you've considered**
[laravel passport](https://laravel.com/docs/8.x/passport)

**Additional context**