Get the employer tree structure starting from a specified employer. 

Specify the identifier of the employer to start the tree from. This field is mandatory. 

Each level of the tree is represented by a TEmployerTree object. Each object in turn has a ChildEmployers property which is a List of TEmployerTree, specifying the children of that employer. This allows you to recursively traverse the tree. The root TEmployerTree that is returned will contain the starting employer that you specified. 

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

This function has security level "Protected", and can only be accessed by users that have explicitly been granted permission to the API.

[WebMethod(Description = "Gets the employer tree structure starting from the specified employer identifier")]
public TAuthEmployerTree GetEmployerTree(string token, string employerIdentifier);