1 files changed, 1 insertions, 1 deletions
diff --git a/Core/Authentication/Provider/UserAuthenticationProvider.php b/Core/Authentication/Provider/UserAuthenticationProvider.php
index 8183c62..ce78df6 100644
--- a/Core/Authentication/Provider/UserAuthenticationProvider.php
+++ b/Core/Authentication/Provider/UserAuthenticationProvider.php
@@ -67,7 +67,7 @@ abstract class UserAuthenticationProvider implements AuthenticationProviderInter
             $user = $this->retrieveUser($username, $token);
 
             if (!$user instanceof UserInterface) {
-                throw new AuthenticationServiceException('retrieveUser() must return an UserInterface.');
+                throw new AuthenticationServiceException('retrieveUser() must return a UserInterface.');
             }
 
             $this->userChecker->checkPreAuth($user);