Get the division tree structure that a user can access. 

Specify the client code of a VETtrak user (staff member). The tree structure of divisions that the user can access will be returned. A VETtrak user can be granted access to one or more divisions, and being granted access to a division also grants access to all descendant divisions of that division. 

Each level of the tree is represented by a TDivisionTree object. Each object in turn has a ChildDivisions property which is a List of TDivisionTree, specifying the children of that division. This allows you to recursively traverse the tree. The returned list of TDivisionTree objects represents each top-level division that the user can access. 

A token is passed for authentication. If the authentication fails, or other errors occur, no divisions are returned. The result of the authentication is represented by a TAuthenticate object. 

This function has security level "Restricted". Users that have explicitly been granted permission to the API can use it with any parameters, otherwise, the logged-in client can only access their own data.

[WebMethod(Description = "Gets the division tree structure that a user can access")]
public TAuthDivisionTreeList GetAccessibleDivisionsTree(string token, string clientCode);