diff --git a/auth.h b/auth.h
index c6a444a..79f5342 100644
--- a/auth.h
+++ b/auth.h
@@ -1,9 +1,6 @@
 #ifndef AUTH_H
 #define AUTH_H
-
-#include <string>
 #include "user.h"
-
-int authentifier(std::string login, std::string password);
-
+#include <vector>
+int authentifier(const std::string& login, const std::string& password, const std::vector<User>& users);
 #endif
\ No newline at end of file