Only auto-create draupnir user if a password has been set

The Draupnir role supports configuring it with either an access token or with a password.

When a password is not assigned (which means the access token mode is used), the user is to be created manually.

group_vars/matrix_servers

@@ -5864,7 +5864,7 @@ matrix_user_creator_users_auto: |
       'username': matrix_bot_draupnir_login,
       'initial_password': matrix_bot_draupnir_password,
       'initial_type': 'bot',
-    }] if matrix_bot_draupnir_enabled else [])
+    }] if matrix_bot_draupnir_enabled and matrix_bot_draupnir_password else [])
   }}
 
 ######################################################################