Updated Synology.DSM user description (home-assistant#1413)

ProtoThis · fabaff · commit a3c63fd0571e · 2016-11-08T00:12:00.000+01:00
It was unclear which rights the user needed to read this information. Added this to the sensor page
diff --git a/source/_components/sensor.synologydsm.markdown b/source/_components/sensor.synologydsm.markdown
@@ -30,12 +30,13 @@ sensor:
       - memory_real_usage
       - network_up
 ```
+Note: After booting HASS it can take up to 15 minutes for the sensors to show up. This is due to the fact that sensors are created after HASS has fully been initialised.
 
 Configuration variables:
 
 - **host** (*Required*): The IP address of the Synology NAS to monitor
 - **port** (*Optional*): The port number on which the NAS is reachable. Defaults to `5000`. 
-- **username** (*Required*): An user to connect to the Synology NAS (a seperate account is adviced).
+- **username** (*Required*): An user to connect to the Synology NAS (a seperate account is adviced, see the Seperate User Configuration section below for details).
 - **password** (*Required*): The password of the user to connect to the Synology NAS.
 - **volumes** (*Optional*): Array of volumes to monitor. Defaults to all volumes.
 - **disks** (*Optional*): Array of disks to monitor. Defaults to all disks.
@@ -71,3 +72,8 @@ Configuration variables:
   - **volume_disk_temp_avg**: Displays the average temperature of all disks in the volume (creates a new entry for each volume).
   - **volume_disk_temp_max**: Displays the maximum temperature of all disks in the volume (creates a new entry for each volume).
 
+Seperate User Configuration:
+
+Due to the nature of the Synology DSM Api it is required to grant de user admin rights. This is related to the fact that utilisation information is stored in the core module. 
+
+When creating the user it is possible to deny access to all locations and applications. By doing this the user will not be able to login to the web interface or view any of the files on the NAS. It is still able to read the utilisation and storage information using the API.
