[BUG] Fix the backend for recurring notifications and birthday notifications

## Context

- Currently sending the one time notification works properly, but the recurring and birthday notifications do not.
- For the recurring notification, just do a polling solution don't worry about setting up a CRON job or something like that.
- Reach out if you need help with this
- Check the user model to make sure the birthday is properly saved.

## Requirements

- Fix the issue, reach out if you need more help

## Acceptance Criteria

- [ ] Fix the issue