TODO:

1. Move more properties to config - done
2. Split Common project for API and Service logic (it's either this or this so there is no need to have both in one DLL) done
3. Comment Swagger properly - done
4. Validate models with correct attributes - done
5. Add failchecks, wait for answers and return proper HttpCode
6. Rethink encapsulation - done
7. Test EventFromSeries CRUD operations. - done
8. Return Ids for easier checks - done
9. Change Enum serialization to string - done
10. Implement EmailActor - done