solution for task 3

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diff --git a/challenge-021/randy-lauen/perl6/ch-3.p6 b/challenge-021/randy-lauen/perl6/ch-3.p6
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+#!/usr/bin/env perl6
+
+=begin SYNOPSIS
+
+Task: Write a script to use BC Gov News API.
+
+This script prints out the top and feature post headlines.
+
+Example output:
+
+    $ perl6 ch-3.p6
+    topPostKey
+    * News Release: Third urgent and primary care centre opens in Greater Vancouver
+    * Backgrounder: North Vancouver UPCC
+
+    featurePostKey
+    * News Release: Province seeks feedback to ban, reduce, recycle more plastics
+
+=end SYNOPSIS
+
+use Cro::HTTP::Client;
+use URI::Encode;
+
+class ApiClient {
+    has %.params;
+    has $.base-uri;
+    has $!client = Cro::HTTP::Client.new(
+        :http('1.1'),
+        :base-uri( $!base-uri )
+        :headers( [ Accept => 'application/json' ] ),
+    );
+
+    method get( $path ) {
+        return self!get-json( "$path?" ~ %!params.pairs.map( { .key ~ '=' ~ .value } ).join('&') );
+    }
+
+    method !get-json( $uri ) {
+        my $encoded = uri_encode( $uri );
+        my $response = await $!client.get( $encoded );
+        return await $response.body;
+    }
+}
+
+
+sub MAIN() {
+    my $client = ApiClient.new(
+        base-uri => 'https://news.api.gov.bc.ca',
+        params   => %( :api-version('1.0') ),
+    );
+    my %homeInfo = $client.get( '/api/Home' );
+
+    for <topPostKey featurePostKey> -> $key {
+        my %postInfo = $client.get( "/api/Posts/%homeInfo{$key}" );
+        say $key;
+
+        for %postInfo<documents>.flat -> $doc {
+            say "* $doc<pageTitle>: $doc<headline>";
+        }
+        say '';
+    }
+}