Move non-action public method controller callback to private methods (#31933)

app/controllers/auth/sessions_controller.rb

@@ -20,11 +20,6 @@ class Auth::SessionsController < Devise::SessionsController
     p.form_action(false)
   end
 
-  def check_suspicious!
-    user = find_user
-    @login_is_suspicious = suspicious_sign_in?(user) unless user.nil?
-  end
-
   def create
     super do |resource|
       # We only need to call this if this hasn't already been
@@ -101,6 +96,11 @@ class Auth::SessionsController < Devise::SessionsController
 
   private
 
+  def check_suspicious!
+    user = find_user
+    @login_is_suspicious = suspicious_sign_in?(user) unless user.nil?
+  end
+
   def home_paths(resource)
     paths = [about_path, '/explore']