Add link to realms page (#131)

Author: denniskuijs

docs/user-guide/manager-ui/manager-ui.md

@@ -4,7 +4,7 @@ sidebar_position: 1
 
 # Manager UI
 
-The Manager UI is the dashboard which gives you access to OpenRemote, and allows you to configure, monitor, and control your IoT platform. You can access it at `https://localhost` for the master realm, or at `https://localhost/manager/?realm=yourrealm`, for a specific realm. We'll explain the main features of the Manager UI, sometimes referring to examples from the [online Demo](https://openremote.io/demo/), for which you only have access in 'read' mode. To have full 'admin' access to all functionality you will first need to [install OpenRemote](https://github.com/openremote/openremote/blob/master/README.md). If you prefer watching a video, rather than reading, check out the [Introduction Videos](https://youtu.be/4MhxwfbOao8).
+The Manager UI is the dashboard which gives you access to OpenRemote, and allows you to configure, monitor, and control your IoT platform. You can access it at `https://localhost` for the master realm, or at `https://localhost/manager/?realm=yourrealm`, for a specific [realm](../identity-and-security/realms-users-and-roles.md#realms). We'll explain the main features of the Manager UI, sometimes referring to examples from the [online Demo](https://openremote.io/demo/), for which you only have access in 'read' mode. To have full 'admin' access to all functionality you will first need to [install OpenRemote](https://github.com/openremote/openremote/blob/master/README.md). If you prefer watching a video, rather than reading, check out the [Introduction Videos](https://youtu.be/4MhxwfbOao8).
 
 To access the Manager you will first need to login with the correct credentials (admin/secret for your local installation). Note that our account management and identity service includes features like a 'forgot password' flow. See [Realms](#realms), [Users and Roles](#users-and-access-configuration) for more details.