Implement login signup dashboard system for the github user on codebadge.

### Is your feature request related to a problem? Please describe.

As of now, all the codebadge requests are handled at frontend using cronjobs. We need to port all the frontend computation for badge calculation to the backend.

### Describe the solution you'd like
Implemented backend for the above-mentioned problems.
- [ ] login
- [ ] signup
- [ ] fetching github user details
- [ ] fetching github organization details
- [ ] fetching github organization members

### Additional context
Working on it