anchor.diff:  3. handle-unauthorized is executed of your backend, if user has specified it own function,
      the user defined function is executed else, default behavior is executed.
   
  +
   Examples
   --------
   
  
positive.code: 
  NOTE: `make-hash` and `verify` also accept salt for using salted hashes.
  
  In previous example we use *pbkdf2* hasher but _budd_ also support many other
  hasher algorithm by default. This is a complete list of implemented hashers:
  
  - `:pbkdf2` (alias for `:pbkdf2-sha1`)
  
negative.code: - if `parse` function returns nil, `authenticate` function is ignored and user handler is
    called directly.
  - `authenticate` also can return a valid response, in these case it has same behavior that
  
  
    with `parse` function.
  =========================
  
  