diff --git a/login/index.php b/login/index.php
index aee574e..1e80536 100644
--- a/login/index.php
+++ b/login/index.php
@@ -551,20 +551,27 @@
         echo "<h1>Iniciar Sessão no ClassLink</h1>";
         echo "<p class=\"small\">Para aceder à plataforma, deve autenticar-se com a sua conta institucional.</p>";
         echo "<a href=\"/login?redirecttoflow=1\" class=\"login-btn\">";
-        echo "<svg class=\"ms-logo\" width=\"21\" height=\"21\" viewBox=\"0 0 21 21\" xmlns=\"http://www.w3.org/2000/svg\" style=\"vertical-align: middle; margin-right: 8px;\">";
-        echo "<rect class=\"ms-rect1\" x=\"1\" y=\"1\" width=\"9\" height=\"9\" fill=\"white\"/>";
-        echo "<rect class=\"ms-rect2\" x=\"11\" y=\"1\" width=\"9\" height=\"9\" fill=\"white\"/>";
-        echo "<rect class=\"ms-rect3\" x=\"1\" y=\"11\" width=\"9\" height=\"9\" fill=\"white\"/>";
-        echo "<rect class=\"ms-rect4\" x=\"11\" y=\"11\" width=\"9\" height=\"9\" fill=\"white\"/>";
-        echo "</svg>";
-        echo "Login com Microsoft";
+        if (isset($authProvider) && $authProvider === 'Microsoft') {
+            echo "<svg class=\"ms-logo\" width=\"21\" height=\"21\" viewBox=\"0 0 21 21\" xmlns=\"http://www.w3.org/2000/svg\" style=\"vertical-align: middle; margin-right: 8px;\">";
+            echo "<rect class=\"ms-rect1\" x=\"1\" y=\"1\" width=\"9\" height=\"9\" fill=\"white\"/>";
+            echo "<rect class=\"ms-rect2\" x=\"11\" y=\"1\" width=\"9\" height=\"9\" fill=\"white\"/>";
+            echo "<rect class=\"ms-rect3\" x=\"1\" y=\"11\" width=\"9\" height=\"9\" fill=\"white\"/>";
+            echo "<rect class=\"ms-rect4\" x=\"11\" y=\"11\" width=\"9\" height=\"9\" fill=\"white\"/>";
+            echo "</svg>";
+            echo "Iniciar Sessão com Microsoft";
+        } else {
+            $providerName = isset($authProvider) ? htmlspecialchars($authProvider, ENT_QUOTES, 'UTF-8') : 'OAuth';
+            echo "Iniciar Sessão com Fornecedor de Identidade " . $providerName;
+        }
         echo "</a>";
-        echo "<style>";
-        echo ".login-btn:hover .ms-rect1 { fill: #f25022; }";
-        echo ".login-btn:hover .ms-rect2 { fill: #7fba00; }";
-        echo ".login-btn:hover .ms-rect3 { fill: #00a4ef; }";
-        echo ".login-btn:hover .ms-rect4 { fill: #ffb900; }";
-        echo "</style></a>";
+        if (isset($authProvider) && $authProvider === 'Microsoft') {
+            echo "<style>";
+            echo ".login-btn:hover .ms-rect1 { fill: #f25022; }";
+            echo ".login-btn:hover .ms-rect2 { fill: #7fba00; }";
+            echo ".login-btn:hover .ms-rect3 { fill: #00a4ef; }";
+            echo ".login-btn:hover .ms-rect4 { fill: #ffb900; }";
+            echo "</style>";
+        }
         echo "</div>";
         echo "";
         echo "<div class=\"notice\">";
diff --git a/src/config.sample.php b/src/config.sample.php
index 1e116c3..ea4ec22 100644
--- a/src/config.sample.php
+++ b/src/config.sample.php
@@ -18,19 +18,18 @@
         'password' => ''
     );
 
-    // Database configuration (MySQL/MariaDB)
-    // SECURITY: Use strong passwords and restrict database user permissions
+    // Configuração da DB
     $db = array(
-        'tipo' => 'mysql',
+        'tipo' => 'mysql', // deixar assim
         'servidor' => 'localhost',
         'user' => 'reservasalas',
-        'password' => 'salaspass',  // CHANGE THIS to a strong password
+        'password' => 'salaspass',  // USAR SEMPRE PASSWORDS FORTES
         'db' => 'reservasalas',
         'porta' => 3306
     );
 
-    // OAuth 2.0 configuration
-    // SECURITY: Keep clientId and clientSecret confidential
+    // Configuração do fornecedor OAuth2
+    $authProvider = 'Microsoft';
     $provider = new GenericProvider([
         'urlAuthorize'            => 'https://authentik.devenv.marcopisco.com/application/o/authorize/',
         'urlAccessToken'          => 'https://authentik.devenv.marcopisco.com/application/o/token/',