Problem Definition

The exported field values may contain comma (such as in username, full_name or email), and the comma possibly conflict with CSV separator.

Suggested Solution

Escape all fields with a pair of double quotes. This doesn't violate RFC 4180, and most of CSV library or application (e.g. Excel) can handle such a format.

Workaround

None. You can find entries where the number of fields (8 in this case) is larger than expected, and fix the data manually:

awk -F ',' 'NF>8 { print $0 }' ~/Downloads/export-users.csv