Get notifications of a budget
/// This exception is thrown if the paging token is expired - past its TTL
///
/// This exception is thrown on an unknown internal failure.
///
/// This exception is thrown if paging token signature didn't match the token, or the
/// paging token isn't for this request
///
/// This exception is thrown if any request is given an invalid parameter. E.g., if a
/// required Date field is null.
///
/// This exception is thrown if a requested entity is not found. E.g., if a budget id
/// doesn't exist for an account ID.
///