The UserTable section of the Pipeworks manifest describes how users of a site will be stored in Azure Table Storage. Here's an example (from the site StartLearningPowerShell.com

            
@{             
UserTable = @{             
Name = 'StartLearningPowerShellUsers'             
Partition = 'Users'             
StorageAccountSetting = 'AzureStorageAccountName'             
StorageKeySetting = 'AzureStorageAccountKey'             
}             
}