FEATURE: enforce admin password validation when signing up via developer email

app/services/username_checker_service.rb

@@ -6,17 +6,21 @@ class UsernameCheckerService
       if !validator.valid_format?
         {errors: validator.errors}
       else
-        check_username_availability(username)
+        check_username_availability(username, email)
       end
     end
   end
 
-  def check_username_availability(username)
+  def check_username_availability(username, email)
     if User.username_available?(username)
-      { available: true }
+      { available: true, is_developer: is_developer?(email) }
     else
       { available: false, suggestion: UserNameSuggester.suggest(username) }
     end
   end
 
+  def is_developer?(value)
+    Rails.configuration.respond_to?(:developer_emails) && Rails.configuration.developer_emails.include?(value)
+  end
+
 end