plugin to printer for my Photo application written in Flutter -- 2

Hello, I want to have a photo editing application print plugin. The length of the photo must be 45 mm and the width 35 mm. It should print 8 as in the example.and I want to have an admin panel for my application. Features I want in the admin panel:
-Add users
-Setting photo price for users
- Shows the price information of the photos that users print
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