Make supplier signup working as expected

app/controllers/registrations_controller.rb

@@ -0,0 +1,9 @@
+class RegistrationsController < Devise::RegistrationsController
+
+  private
+
+  # override devise internal to allow name as sign_up param
+  def sign_up_params
+    params.require(resource_name).permit resource_class.authentication_keys + [:name, :password, :password_confirmation]
+  end
+end