diff --git a/auth/iam_single.go b/auth/iam_single.go
index 6557a2ee..af8b7659 100644
--- a/auth/iam_single.go
+++ b/auth/iam_single.go
@@ -32,7 +32,7 @@ func (IAMServiceSingle) CreateAccount(account Account) error {
 
 // GetUserAccount no accounts in single tenant mode
 func (IAMServiceSingle) GetUserAccount(access string) (Account, error) {
-	return Account{}, ErrNotSupported
+	return Account{}, ErrNoSuchUser
 }
 
 // DeleteUserAccount no accounts in single tenant mode