Add automated tests of authentication system

[Zachiah]

1. Ensure /auth/api/login validates the request to match { email: email}
2. Ensure when successful, /auth/api/login will send a token (it will call the sendEmail function)
3. Ensure that the /auth/api/authenticate route validates request to look like {email, emailToken}
4. Ensure that the /auth/api/validate_request_auth route will correctly show if the user has a valid jwt