Currently, the Flow Builder does not offer a dedicated trigger for logging into a customer account, only in connection with the checkout process. This significantly limits automation possibilities.

Proposed Enhancement:
A new "Login" trigger that activates whenever a customer logs into their account – independently of the checkout process.

Possible Use Cases:

Automatic tag assignment based on login frequency.

Customer group changes for logged-in users, e.g., granting access to exclusive content or discounts.

Automated email dispatch, e.g., a welcome back message after a long period of inactivity or targeted marketing campaigns.