diff --git a/src/CoMagic/CallApiClient.php b/src/CoMagic/CallApiClient.php
index c858139..bc090fc 100644
--- a/src/CoMagic/CallApiClient.php
+++ b/src/CoMagic/CallApiClient.php
@@ -12,7 +12,7 @@ class CallApiClient
 {
     private string $version = 'v4.0';
     private ?string $accessToken = null;
-    private ?string $accessTokenExpires = null;
+    private ?int $accessTokenExpires = null;
     private ?string $login = null;
     private ?string $password = null;
     private ?Client $client = null;
@@ -40,6 +40,11 @@ public function __construct(CallApiConfig $config, ?Client $client = null)
             '/' . $this->version;
     }
 
+    public function getAccessToken(): ?string
+    {
+        return $this->accessToken;
+    }
+
     private function refreshAccessToken(): void
     {
         // Check if access token is not expired
@@ -50,7 +55,7 @@ private function refreshAccessToken(): void
             return;
         }
 
-        $data = $this->doRequest(
+        $response = $this->doRequest(
             'login.user',
             [
                 'login' => $this->login,
@@ -58,8 +63,8 @@ private function refreshAccessToken(): void
             ]
         );
 
-        $this->accessToken = $data->access_token;
-        $this->accessTokenExpires = $data->expire_at;
+        $this->accessToken = $response->access_token;
+        $this->accessTokenExpires = $response->expire_at;
     }
 
     /**
@@ -113,7 +118,7 @@ private function doRequest(string $method, array $params)
             $responseBody = json_decode($response->getBody()->getContents());
 
             if (isset($responseBody->result)) {
-                $this->metadata = $responseBody->result->metadata;
+                $this->metadata = $responseBody->result->metadata ?? null;
             }
 
             if (isset($responseBody->error)) {
diff --git a/tests/CallApiClientTest.php b/tests/CallApiClientTest.php
index 6778282..329ba0e 100644
--- a/tests/CallApiClientTest.php
+++ b/tests/CallApiClientTest.php
@@ -25,6 +25,71 @@ public function testCanBeCreated(): void
         );
     }
 
+    public function testCanObtainAccessTokenByLoginAndPassword(): void
+    {
+        $config = new CallApiConfig('login', 'password');
+        $httpClient = $this->createMock(Client::class);
+
+        $expectedNewAccessToken = 'new-access-token';
+        $expectedBaseUri = rtrim($config->getEntryPoint(), '/') . '/v4.0';
+        $expectedHttpLoginPayload = [
+            'jsonrpc' => '2.0',
+            'id' => time(),
+            'method' => 'login.user',
+            'params' => [
+                'login' => $config->getLogin(),
+                'password' => $config->getPassword(),
+            ],
+        ];
+        $expectedHttpListCallsPayload = [
+            'jsonrpc' => '2.0',
+            'id' => time(),
+            'method' => 'list.calls',
+            'params' => [
+                'access_token' => $expectedNewAccessToken,
+            ],
+        ];
+        $httpClient->expects($this->exactly(2))
+            ->method('post')
+            ->with(
+                $expectedBaseUri,
+                $this->logicalOr(
+                    $this->equalTo(['json' => $expectedHttpLoginPayload]),
+                    $this->equalTo(['json' => $expectedHttpListCallsPayload])
+                )
+            )
+            ->willReturnOnConsecutiveCalls(
+                new Response(
+                    200,
+                    [],
+                    json_encode([
+                        'result' => [
+                            'data' => [
+                                'access_token' => $expectedNewAccessToken,
+                                'expire_at' => time() + 3600,
+                            ],
+                        ],
+                    ])
+                ),
+                new Response(
+                    200,
+                    [],
+                    json_encode(['result' => ['data' => []]])
+                )
+            );
+
+        $client = new CallApiClient($config, $httpClient);
+
+        $this->assertNull($client->getAccessToken());
+
+        $client->listCalls();
+
+        $this->assertEquals(
+            $expectedNewAccessToken,
+            $client->getAccessToken()
+        );
+    }
+
 
     /** @dataProvider apiCallsProvider */
     public function testCanDoApiCalls(