set_email: Save your ESS email as an environment variable
Description
Save your ESS email as an environment variable
Usage
set_email(ess_email)
Arguments
ess_email
a character string with your registered email.
Details
You should only run set_email() once and every import_ and download_ function
should work fine. Make sure your email is registered at
http://www.europeansocialsurvey.org/ before setting the email.