The auditing tools can be used to see who has been using the program. You are able to see who has signed in/out, who has accessed the users management page, who has created forms, deleted forms, read or updated data.
To access the auditing tools, you must be an administrator of the account. Please click on My Account at the top of the page, and select "Auditing Tools". From here you will be able to select any of the options, and a time frame and doing so will download an excel file with the requested data.
Please note that the date range can only be a maximum of 30 days.