S1:-Tools-I.md

@@ -57,7 +57,7 @@ In this **course** we will use **Github**
 ### Your Github's account
 
 * Create your account on [Github](https://github.com).
-* Generate a [token](https://github.com/settings/tokens/new)
+* Generate a [token](https://github.com/settings/tokens/new). Please, **choose an appropriate expiration time (no expiration time) and copy your token in a safe place**. In case you lose your token, you will need to generate a new one.
 * Once you have your account and token created, you can create and edit your profile. Mine is [sarroutbi](https://github.com/sarroutbi).
 
 ### Playing with repositories