What changed
When you install GNIZDO from Shopify and create a GNIZDO account, the pending store connection now waits for you through sign-up and email verification. After you confirm your email, GNIZDO finishes connecting the store automatically, including when the verification link opens in a new browser tab.
The pending connection belongs to the first GNIZDO account that signs in after the install. If a different account signs in on the same browser, the pending connection is discarded instead of being attached to that account, and signing out also clears it.
If the installation link expired
A pending installation is still valid for a limited time and can be used once. If it expires before you finish, GNIZDO now tells you how to recover: open GNIZDO from your Shopify admin (Apps → GNIZDO) and the connection completes for your signed-in account.
Already connected stores
Stores that are already connected keep working as before, and opening GNIZDO from Shopify admin again reuses the same connected store instead of creating a duplicate.