refactor: combine activeUser and User to one collection

[Dun-sin]

👨‍💻 Changes proposed(What did you do ?)

• delete activeUser collection/model
• change User model to have the same fields as activeUser had
• created a function to generate the right kind of id acceptable by mongodb
• pass loginid when creating a user
• change every ActiveUser ref to User
• when deleting an ActiveUser only delete them if they don't have an email so we can check the actual amount of users we have

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• [x] My code follows the code style of this project.
• [x] This PR does not contain plagiarized content.
• [x] The title and description of the PR is clear and explains the approach.

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