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'
}
}