Shopify/active_merchant — pull request #1309 by rwdaigle (2014-07-16 15:24:30+00:00)
Title: Make account a mandatory field for Optimal Payments.

The Optimal Payments gateway requires an accountNum field as part of the
credentials. This commit makes it a mandatory field while also deprecating
the existing login field which is called store_id in Optimal vernacular.

Closes #1307