Update userModel and randoModel
Refactore callbacks in models
Update rando model and revert commentService
Refactore brackets
Fix syntax error
Remove mkdirp and validator dependencies
Rework pairRandos
Update pairServiceTest
Add async iterator to pairService.pair
Remove user arg from updateModel.create callback
Fix small issues and Refactor pairService and Update pairServiceTest
Merge branch 'rework-models'