[Tests] Add test for the user model

[MxOliver]

Add tests for the user model (app/models/user.rb)

[TheIncredibleHarsh]

I'm trying this

[TheIncredibleHarsh]

I am facing problem trying to setup postgres on my macbook pro 2019 macOSX mojave

[kalimar]

@TheIncredibleHarsh moving the question over here #292

You can also ask in our slack channel. Join slack teamhere https://rubyforgood.herokuapp.com/
and look for #terrastories channel

Thanks again for contributing.

[sleekybadger]

I opened #308 that should close this.

[mirandawang]

@sleekybadger Added a question for you in #308 - thank you!!