wip: migrate to mono-repo. SPN has already been moved to spn/

spn/access/token/errors.go

@@ -0,0 +1,15 @@
+package token
+
+import "errors"
+
+// Errors.
+var (
+	ErrEmpty          = errors.New("token storage is empty")
+	ErrNoZone         = errors.New("no zone specified")
+	ErrTokenInvalid   = errors.New("token is invalid")
+	ErrTokenMalformed = errors.New("token malformed")
+	ErrTokenUsed      = errors.New("token already used")
+	ErrZoneMismatch   = errors.New("zone mismatch")
+	ErrZoneTaken      = errors.New("zone taken")
+	ErrZoneUnknown    = errors.New("zone unknown")
+)