createacct() Sorry you must choose a package

I'm using this code changing only the parts of username password and domain and when I'm going to run on git bash or on my own server it says "sorry you must choose a package" being that I put the correct pkgname what do I do? https://hostname.example.com:2087/cpsess##########/json-api/createacct?api.version=1&username=username&domain=example.com&bwlimit=unlimited&cgi=1&contactemail=username@example.com&cpmod=paper_lantern&customip=192.0.2.0&dkim=1&featurelist=feature_list&forcedns=0&frontpage=0&gid=123456789&hasshell=0&hasuseregns=1&homedir=/home/user&ip=n&language=en&owner=root&mailbox_format=mdbox&max_defer_fail_percentage=unlimited&max_email_per_hour=unlimited&max_emailacct_quota=1024&maxaddon=unlimited&maxftp=unlimited&maxlst=unlimited&maxpark=unlimited&maxpop=unlimited&maxsql=unlimited&maxsub=unlimited&mxcheck=auto&password=123456luggage&pkgname=my_new_package&plan=default"a=500&reseller=0&savepkg=1&spamassassin=1&spf=1&spambox=y&uid=123456789&useregns=1