How can I disable POSNext on my iPad's Shopify POS?

[fcrdaddy]

When logging into Shopify POS on my iPad, I am presented with the message "POSNext" Wants to Use "shopify.com" to Sign In, followed by the note This allows the app and website to share information about you. I have not added POSNext as an application nor do I understand its purpose as I do not see any references in Shopify's documentation. When I see any note regarding the sharing of information, particularly when I have not given authorization, my radar flashes.

My wish is to remain vigilant against intrusive, unnecessary information gathering/sharing. If this is not necessary to the Shopify POS functionality, how do I turn it off? If unnecessary, and can't be turned off, I am willing to use a different POS.