The documentation portal is undergoing maintenance. During this period, you can't create any new user credentials. If you do, you'll need to recreate the user credential after the maintenance period ends.
Blaze advanced properties are a list of advanced or custom properties that are unique to the Blaze engine. Each property contains a name and a value. You can add or edit advanced properties.
To edit the property in the text box, use the following format with &: to separate each name-value pair: