Added login and logout routes

[neilong31]

Helps with #86 by adding routes that with OneLogin

What is added is:

1. login route
2. oauth callback route (We can change the redirection to index.htm
3. logout route

[miggs125]

app.js is not where we will be implementing the endpoints. Routes (endpoints) should be modulated in their respective file depending on the functionality. For example, these routes should be placed in a file with a name such as auth.js or similar. You are not making use of the router that was created in #141. Please checkout the contents of /src/backend/web and try to understand what is going on there. Checkout this article to find out how express router works. Here is another link regarding express router. This file should only be used to define the app and the middleware it uses, not the endpoints .

[miggs125]

Additionally, any endpoint to be implemented needs a test. See #141 to see how these can be implemented.

[neilong31]

Oh okay thanks! I think I see my mistake. I'll try and post my fix tonight.

[humphd]

@neilong31 it looks like you merged this in without getting review. I see @miggs125 has comments above that don't seem to be addressed.

I'm not clear what happened here, but I'd like to have it fixed in a follow-up PR. Please make one to deal with the outstanding comments, and let's not merge our own code without review approvals.