Update for new Nest Version

Bump to 7.0.0 of NestJS.

Fixed issues with ObjectId Scalar

There were inconsistencies with ObjectId Scalar in the schema and the definition, as well as not being included in the Providers for the User Module.

Fix bug on expiration timer

1.0.1

Fixes #2 expiration time bug

Release

Changes once stable will include a new version to indicate bug fixes, new features, or breaking features.