Don't double encode filter values

composer.json

@@ -23,6 +23,7 @@
         "pestphp/pest": "^1.20",
         "pestphp/pest-plugin-mock": "^1.0",
         "phpstan/phpstan": "^1.9",
+        "spatie/invade": "^2.1",
         "spatie/ray": "^1.28",
         "vlucas/phpdotenv": "^5.5"
     },

src/MakesHttpRequests.php

@@ -72,7 +72,7 @@ protected function buildFilterString(array $filters): string
 
         $preparedFilters = [];
         foreach ($filters as $name => $value) {
-            $preparedFilters["filter[{$name}]"] = urlencode($value);
+            $preparedFilters["filter[{$name}]"] = $value;
         }
 
         return '?'.http_build_query($preparedFilters);

tests/MakesHttpRequestsTest.php

@@ -0,0 +1,11 @@
+<?php
+
+use Spatie\MailcoachSdk\Mailcoach;
+
+it('does not double encode', function () {
+    $mailcoach = new Mailcoach('fake-token', 'fake-uri');
+
+    expect(invade($mailcoach)->buildFilterString([
+        'email' => '[email protected]',
+    ]))->toBe('?filter%5Bemail%5D=info%40spatie.be');
+});