/// <summary>
/// Fetches all the Tenant of a building
/// </summary>
/// <param name="id">The Id of the User</param>
/// <returns>Returns an List of Interfaces of Tenants</returns>
public IEnumerable <ITenant> FetchTenants(string id)
{
var tenants = _personRegister.FetchTenants(_personRegister.FetchBuildingId(id));
return(tenants);
}