In version 2.30.of SNIP it’s possible to load user data as well. Here is how that works:

Note: If you want to load user meta instead, follow this guide.

The field type called “User field” allows you to load user data from the wp_user database table. The following fields are possible:

• login
• nicename
• email
• url
• registered (date)
• status
• display_name