diff --git a/LaunchServer/source/auth/provider/FileAuthProvider.java b/LaunchServer/source/auth/provider/FileAuthProvider.java
index 3b005db..421fa11 100644
--- a/LaunchServer/source/auth/provider/FileAuthProvider.java
+++ b/LaunchServer/source/auth/provider/FileAuthProvider.java
@@ -46,6 +46,11 @@
 			entry = entries.get(CommonHelper.low(login));
 		}
 
+		// Verify is account exist
+		if (entry == null) {
+			return authError("Incorrect username or password");
+		}
+
 		// Verify digest and return true username
 		verifyDigest(entry.password, password);
 		return entry.username;