diff --git a/src/Prometheus/Storage/Redis.php b/src/Prometheus/Storage/Redis.php
index 122d11a..cb1d567 100644
--- a/src/Prometheus/Storage/Redis.php
+++ b/src/Prometheus/Storage/Redis.php
@@ -28,6 +28,7 @@ class Redis implements Adapter
         'read_timeout' => '10',
         'persistent_connections' => false,
         'password' => null,
+        'user' => null,
     ];
 
     /**
@@ -196,8 +197,18 @@ private function ensureOpenConnection(): void
 
         $this->connectToServer();
 
-        if ($this->options['password'] !== null) {
-            $this->redis->auth($this->options['password']);
+        $authParams = [];
+
+        if (isset($this->options['user'])) {
+            $authParams[] = $this->options['user'];
+        }
+
+        if (isset($this->options['password'])) {
+            $authParams[] = $this->options['password'];
+        }
+
+        if (!empty($authParams)) {
+            $this->redis->auth($authParams);
         }
 
         if (isset($this->options['database'])) {