customise error message when account is deleted

app/models/user.rb

@@ -54,10 +54,6 @@ def permissions
     @permissions ||= roles.flat_map(&:permissions).map(&:name).uniq
   end
 
-  def active_for_authentication?
-    super && !discarded?
-  end
-
   def after_confirmation
     create_default_preference
   end
@@ -66,6 +62,17 @@ def unread_notifications?
     notifications.unread.count > 0
   end
 
+  # Devise soft delete methods
+  # https://github.com/heartcombo/devise/wiki/How-to:-Soft-delete-a-user-when-user-deletes-account#4--update-the-user-model-with-soft_delete-method--check-if-user-is-active-when-authenticating
+  #
+  def active_for_authentication?
+    super && !discarded?
+  end
+
+  def inactive_message
+    (!discarded?) ? super : :deleted_account
+  end
+
   private
 
   def create_default_preference

config/locales/en.yml

@@ -218,6 +218,10 @@ en:
     default: "You cannot perform this action."
     user_policy:
       update?: "You are not authorised to perform this action."
+  devise:
+    failure:
+      user:
+        deleted_account: It looks like you've deleted your account. Contact us if you need any support.
   activerecord:
     attributes:
       user:

config/locales/nl.yml

@@ -218,6 +218,10 @@ nl:
     default: "U kunt deze actie niet uitvoeren."
     user_policy:
       update?: "U bent niet bevoegd om deze actie uit te voeren."
+  devise:
+    failure:
+      user:
+        deleted_account: Het lijkt erop dat je je account hebt verwijderd. Neem contact met ons op als je ondersteuning nodig hebt.
   activerecord:
     attributes:
       user: