Hi,
Unfortunately the 'halogin' command does not support using environment variables. All the other ha* commands however do take advantage of environment variables.
Note that when using environment variables for each login session the first time you run an ha* command you will need to provide a valid password, all subsquent ha* commands for that login session will run w/out prmpting for the password.
Use of environment variables is intended for interactive CLI sessions. If you want to run ha* commands from within shell scripts or from the CLI without prompting for a password you will need to establish a long term credential for the user and cache that credential in the users .vadprofile using the halogin command.
Regards,
-Kyle