Update token.go

Fix types

Author: cgostuff

token.go

@@ -21,9 +21,9 @@ import (
 // expirations due to client-server time mismatches.
 var expiryDelta = 10 * time.Second
 
-// make expiryDelta configurable if 10 seconds is insufficient
-func SetExpiryDelta(seconds){
-	expiryDelta = seconds * time.Second
+// make expiryDelta configurable
+func SetExpiryDelta(seconds int){
+	expiryDelta = time.Duration(seconds) * time.Second
 }
 
 // Token represents the credentials used to authorize