Authentication.md

@@ -2,6 +2,8 @@
 
 ![B2ACCESS integration - sequence diagram](https://raw.githubusercontent.com/wiki/EUDAT-B2SAFE/B2SAFE-core/eudat_aai-b2safe_sequence.png)
 
+(eudat_aai-b2safe_sequence.png)
+
 1a) Authorization scripts, scheduled periodically, fetches the user attributes from Unity ([B2ACCESS](https://eudat.eu/services/b2access)), 
 via REST admin interface, providing username/password. It gets the attributes of all the registered users.  
 In particular it gets the unique id associated to each user which, combined with the EUDAT CA distinguished name and