refactoring collection a little bit, adjust token from collection manual,write some test for the simple logic, fixing superusers authAdmin

tests/ClientTest.php

@@ -0,0 +1,48 @@
+<?php
+
+use Pb\Client;
+use Pb\Collection;
+use Pb\Settings;
+use PHPUnit\Framework\TestCase;
+
+final class ClientTest extends TestCase
+{
+    private Collection $collection;
+    private ?string $url;
+
+    protected function setUp(): void
+    {
+        $this->url = getenv('POCKETBASE_URL') ?: 'https://admin.pocketbase.dev';
+        $this->collection = new Collection($this->url, 'users');
+    }
+
+    public function test_collection(): void
+    {
+        $pb = new Client($this->url);
+
+        $actual = $pb->collection('users');
+
+        $this->assertEquals($actual, $this->collection);
+    }
+
+    public function test_settings(): void
+    {
+        $pb = new Client($this->url);
+
+        $actual = $pb->settings();
+
+        $this->assertEquals($actual, new Settings($this->url));
+    }
+
+    public function test_setToken(){
+        $token = 'test123';
+
+        $pb = new Client($this->url);
+        $pb->setAuthToken($token);
+
+        $this->assertEquals($token, $pb->getAuthToken());
+        $this->assertEquals($token, $pb->token);
+        $pb->token = 'test456';
+        $this->assertEquals('test456', $pb->getAuthToken());
+    }
+}