Add docs

app/controllers/passwordless/sessions_controller.rb

@@ -39,17 +39,19 @@ def create
  end
  end
 
- # get '/:resource/sign_in/:id'
+ # get "/:resource/sign_in/:id"
  # Shows the form for confirming a Session record.
  # renders sessions/show.html.erb.
  def show
  @session = find_session
  end
 
  # patch "/:resource/sign_in/:id"
+ # User submits the form for confirming a Session record.
  # Looks up session record by provided token. Signs in user if a match
  # is found. Redirects to either the user's original destination
  # or _Passwordless.config.success_redirect_path_.
+ #
  # @see ControllerHelpers#sign_in
  # @see ControllerHelpers#save_passwordless_redirect_location!
  def update
@@ -60,6 +62,14 @@ def update
  authenticate_and_sign_in(@session, passwordless_session_params[:token])
  end
 
+ # get "/:resource/sign_in/:id/:token"
+ # User visits the link sent to them via email.
+ # Looks up session record by provided token. Signs in user if a match
+ # is found. Redirects to either the user's original destination
+ # or _Passwordless.config.success_redirect_path_.
+ #
+ # @see ControllerHelpers#sign_in
+ # @see ControllerHelpers#save_passwordless_redirect_location!
  def confirm
  # Some email clients will visit links in emails to check if they are
  # safe. We don't want to sign in the user in that case.