Garth, we don’t want you to have to pay for the data from your own sensor. Please send us an email with the order number(s) of sensor(s) you have purchased, and we’ll apply free points to your account. We’ll also need to know the email or an API key on the account.
Additionally, @Bugs is correct that you can access the data locally through the IP of the sensor. Outside of that, you can use the PurpleAir Utility to get live data, or you can use an SD card if the sensor has SD logging capabilities.