I'm working on a flow that will query database for records and compile using the FileAccess node to create a csv file to be attached in an email if there more than 1 record count. When I run the flow, I get data returned and a csv file is created, but when I try opening the csv file, it says "null". Am I missing a step to send the data to csv? What should the variable be in the Input Data section of the FileAccess node?