diff --git a/api/auth/errors.go b/api/auth/errors.go
new file mode 100644
index 0000000..0f9aa06
--- /dev/null
+++ b/api/auth/errors.go
@@ -0,0 +1,7 @@
+package api_auth
+
+const (
+	ErrorInvalidCredentials = "INVALID_CREDENTIALS"
+	ErrorInvalidToken       = "INVALID_TOKEN"
+	ErrorExpiredToken       = "EXPIRED_TOKEN"
+)