When using the firebase-connector and creating a Data variable of type 'new-data-record' for it, the type of the variable is unknown. Which means no properties of this data variable are accessable.
The variable does not use the schema of the manually entered firebase DB.
Reference - program working correctly with client side data base: When using a client-Side-Database, the Data-Varibale of type 'New Data Record' comes with the correct schema.