Started code cleanup on models.py #160

[vishalprashant]

Description

• cleaned up imports
• improved naming for random functions
• added standard Meta and str functions with more verbose f strings for classes
• removed blank=True for some user/organization fields because they seem like they should be necessarily filled
• added a couple extra checks in conditionals

Checklist

• [x] Ran the Black Formatter and

  djLint-er on any new code (checks will fail without)

• [x] Made any changes or additions to the documentation where required

• [x] Changes generate no new warnings/errors

• [ ] New and existing unit tests pass locally with my changes

What type of PR is this?

• ♻️ Code Refactor

Added/updated tests?

• 🙅 no, because I need help

Related PRs, Issues etc

• Related Issue #160