Hello devise and omniauth-google
rails generate devise:install
Create devise user
Add omni controller
Add google oauth config
Hello haml
test controller
Hello google api client
Change devise setting for google calendar
Set token to sesssion
Add oauth filter
Change controller name test -> main
Change root
Bye erb
Add Sign out button
Redirect to sign_in page
Show event time
Remove update
Fix confusing valiable name
Implement select box