How do I generate a single-use auto-login URL for WHM/cPanel/Webmail?

Question

When logged into SSH as the root user, use the create_user_session API call to generate a login session for the desired service:

Creating a login session for WHM

# whmapi1 create_user_session user=root service=whostmgrd

Creating a login session for a cPanel user

# whmapi1 create_user_session user=cptest service=cpaneld

Note: replace cptest with the cPanel username you want to use to log in.

Creating a login session for webmail

# whmapi1 create_user_session user=test@cptest.tld service=webmaild

Note: replace test@cptest.tld with the email address you want to log in to.