Azure App services deployment for multinode

Hello ,
I am deploying Uipath app services in azure , following the documentation . The migrate-identityServer.ps1 script mentions one of the parameters azureAccountApplicationId = and azureAccountPassword .
-azureDetails @{azureSubscriptionId = “<subscription_id>”; azureAccountTenantId = “<azure_tenant_id>”; azureAccountApplicationId = “<azure_application_id>”; azureAccountPassword = “<azure_account_password>” }
What application principal do I use here the one I created for orchestrator or the one for the application principal for identity server. Both applications have contributor access to the subscription.
Thank you