do not show signed in alert

app/controllers/registrations_controller.rb

@@ -13,6 +13,12 @@ class RegistrationsController < Devise::RegistrationsController
 
   private
 
+  def require_no_authentication
+    super
+
+    flash.clear
+  end
+
   def build_resource(_hash = {})
     account = Account.new(account_params)
     account.timezone = Accounts.normalize_timezone(account.timezone)

app/controllers/sessions_controller.rb

@@ -9,4 +9,12 @@ class SessionsController < Devise::SessionsController
 
     super
   end
+
+  private
+
+  def require_no_authentication
+    super
+
+    flash.clear
+  end
 end