1 files changed, 7 insertions, 2 deletions
diff --git a/auth.go b/auth.go
index 7b66f5f..ff17bc5 100644
--- a/auth.go
+++ b/auth.go
@@ -8,8 +8,13 @@ import (
 )
 
 var authIface authBackend
-var ErrAuthBackendExists = errors.New("auth backend already set")
-var ErrInvalidSRPHeader = errors.New("encoded password is not SRP")
+
+var (
+	ErrAuthBackendExists   = errors.New("auth backend already set")
+	ErrBanNotSupported     = errors.New("auth backend does not support bans")
+	ErrInvalidSRPHeader    = errors.New("encoded password is not SRP")
+	ErrLastSrvNotSupported = errors.New("auth backend does not support server information")
+)
 
 type user struct {
 	name      string