Authenticate against the server

[mcab]

Need to implement authentication & token passing in order to validate against accessing the API.

[mcab]

There's a lot of cruft still there in the code, that will get removed in future commits.

What's nice is that we have local validation (from Vuelidate), server validation passed (from Vuex), and at least a creation event that we can then redirect from.

[mcab]

We can sign up and login.

I have also made a litany of people (29!) just from this alone.

[mcab]

We let the store generate the toast information, while the components just have the job of displaying said information now.

We also store the auth_token behind the scenes; it's time to now pass that with the Authorization header each time.

[mcab]

It works.