Add gems to gemfile.
Add dotenv file, add to git.
Remove username and password requirements on yaml.
Add routes.
Add omniauth initializer with expanded scope and prompt configurations.
Add users view folder, add show and index views, update application layout.
Fix error in omniauth initializer by adding comma, create migration for users.
Add css stylesheet.
Migrate user and add methods that find or create from oniauth information and set attributes.