Cc 02 user models

[ddusichka]

Description

We created models for User, Customer, and Admin. We tested that these new models can be created, updated, and deleted from the database.

Note that the Customer model has commented out fields. We will uncomment these and update the tests in CC-03 once CC-01 is merged.

How Has This Been Tested?

We wrote unit tests in db_test.go checking the creation, updating, and deletion of our new models.

Checklist:

• [ Yes ] I have performed a self-review of my code
• [ Yes ] I have reached out to another developer to review my code
• [ Yes ] I have commented my code, particularly in hard-to-understand areas
• [ Yes ] New and existing unit tests pass locally with my changes

[matherg]

Looks good. Only thing is that we only need binding: required on the Input types. This is because the input types are what is going to be sent to our api. Basically, when we want to add or update something, we will send an API request with the input type in json format. Binding : required means the json must include that field. Since the input type is the only type that will be sent, it is the only type that needs the "binding : required". After you guys remove that, I'll merge it in.

[joey-tsai]

Removed bindings for all non-Input types.