fix: Only admins can generate invite codes (#1611)

* fix: Only admins can generate invite codes

* fix: raise error if user is not an admin when creating invite codesss

test/controllers/invite_codes_controller_test.rb

@@ -0,0 +1,20 @@
+require "test_helper"
+
+class InviteCodesControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    Rails.application.config.app_mode.stubs(:self_hosted?).returns(true)
+  end
+  test "admin can generate invite codes" do
+    sign_in users(:family_admin)
+
+    assert_difference("InviteCode.count") do
+      post invite_codes_url, params: {}
+    end
+  end
+
+  test "non-admin cannot generate invite codes" do
+    sign_in users(:family_member)
+
+    assert_raises(StandardError) { post invite_codes_url, params: {} }
+  end
+end