Register for a PayMaya Manager 2.0 account. Once approved, you will be provided with a Merchant Account.
To activate your PayMaya eCommerce Plugin, you will need to generate API Keys from your PayMaya Manager 2.0. Login to your PayMaya Manager 2.0, select API Keys and input your Merchant ID to generate the API Key you will use to set up your WooCommerce account.
Once Step #4 is complete, you should be able to see the new plugin in the Wordpress admin plugins page.
Click the v1.5.8 plugin's Settings link then go to PayMaya Checkout payment gateway settings page. Configure with the generated API keys in Step # 2 then press "Save changes." The plugin will automatically set the correct values for the webhook settings (success and failure URLs, webhook token).