https://hostname.example.com:2083/cpsess##########/execute/Postgresql/create_user?name=dbuser&password=12345luggage

$cpanel = new CPANEL(); // Connect to cPanel - only do this once.
 
// Create the PostgreSQL database user "dbuser" with the password "12345luggage"
$create_user = $cpanel->uapi(
    'Postgresql', 'create_user',
    array(
        'user'    => 'dbuser',
        'password'=> '12345luggage',
         )
);

my $cpliveapi = Cpanel::LiveAPI->new(); # Connect to cPanel - only do this once.
 
#  Create the PostgreSQL database user "dbuser" with the password "12345luggage"
my $create_user = $cpliveapi->uapi(
    'Postgresql', 'create_user',
    {
        'name'    => 'dbuser',
        'password'=> '12345luggage',
    }
);

<!--  Create the PostgreSQL database user "dbuser" with the password "12345luggage" -->
[% data = execute( 'Postgresql', 'create_user', { name => 'database', password => '12345luggage'} ); %]

uapi --user=username Postgresql create_user name=dbuser password=12345luggage

{
  "messages": null,
  "errors": null,
  "status": 1,
  "metadata": {
     
  },
  "data": null
}