Unit tests and Coverage

[techno-disaster]

Is your feature request related to a problem? Please describe.
Currently we have no unit tests to check if the app works as it should. We should start adding unit tests which will allow us to see if we have the app has any bugs. When this gets merged we will also be able to see code coverage on the readme in a badge as shown below :)

Describe the solution you'd like
Add unit tests for auth and login part, and update travis and github ci/cd to test the app. Also integrate codecov.io to check code coverage