Use root_url from main_app when redirecting the user in authenticate
Use root_url from main_app when redirecting the user in authenticate

Shopify/shopify_app,Shopify/shopify_app,icodedev7/development,nwallace/shopify_app,kewaunited/shopify_app,kewaunited/shopify_app,mig1098/shopify_app,mig1098/shopify_app,nwallace/shopify_app,Shopify/shopify_app,Shopify/shopify_app,icodedev7/development