diff --git a/src/Security/Core/User/CasUser.php b/src/Security/Core/User/CasUser.php
index 7b4679e..a8a2f59 100644
--- a/src/Security/Core/User/CasUser.php
+++ b/src/Security/Core/User/CasUser.php
@@ -91,7 +91,14 @@ public function getSalt(): ?string
      */
     public function getUser(): string
     {
-        return $this->get('user');
+        trigger_deprecation(
+            'ecphp/cas-bundle',
+            '2.1.2',
+            'The method "%s::getUser()" is deprecated, use %s::getUsername() instead.',
+            CasUserInterface::class
+        );
+
+        return $this->getUsername();
     }
 
     /**
@@ -99,7 +106,7 @@ public function getUser(): string
      */
     public function getUsername(): string
     {
-        return $this->getUser();
+        return $this->get('user');
     }
 
     /**
diff --git a/src/Security/Core/User/CasUserInterface.php b/src/Security/Core/User/CasUserInterface.php
index 181214d..f4c9558 100644
--- a/src/Security/Core/User/CasUserInterface.php
+++ b/src/Security/Core/User/CasUserInterface.php
@@ -32,5 +32,8 @@ public function getAttributes(): array;
 
     public function getPgt(): ?string;
 
+    /**
+     * @deprecated use CasUserInterface::getUsername();
+     */
     public function getUser(): string;
 }