update devise
allow authentication from google
replace the authentication credentials
remove a unused file
refactor the user creation with omniauth
the password shouldnt be required if there is a provider
allow to update the password only if there is a password
cache the result for user
remember me button
change the button for buttons format
allow authentication from facebook
correct a typo
Allow to sign in with twitter
allow to sign up throw github
add a config manager
correct a spec