I wanna ask about how to Installing and testing the "gmail contextual gadget".
https://developers.google.com/gmail/contextual_gadgets#installing_and_testing_the_gadget I'm getting trouble the deprecated document. In first step "1. Log into the console." but when I click it bring me to a page about Apps Marketplace
In this page, the document said, before you publish, you must pay a small fee using google wallet(it's 1st point in "Before you publish"). But when I click the link "Google Wallet", which has link:
https://checkout.google.com/
it shows 404 error page.
Please help me. Thank you!!!
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