anchor.diff:  %% <li>BackendInfo :: any()</li>
   %% </ul>
   %%
  -%% BackendInfo is used for subsequent `handle_authentication/3' and 
  +%% BackendInfo is used for subsequent `handle_authentication/3' and
   %% `get_user/2' calls.
   %%
   %% <b>handle_authentication(Username, Password, BackendInfo) -> Authy</b>
  
positive.code: 	BaseRec = #user_auth{},
  	KeyPos = record_info(fields, user_auth),
  	{error, nyi}.
  
  %% ==================================================================
  %% API
  %% ==================================================================
  
  
  %% ==================================================================
  %% API
  %% ==================================================================
  
  %% ==================================================================
  %% API
  %% ==================================================================
  
  %% ==================================================================
  %% API
  %% ==================================================================
  
  %% ==================================================================
  %% API
  %% ==================================================================
  
  
  %% ------------------------------------------------------------------
  %% 
  %% ------------------------------------------------------------------
  
negative.code: 	?info("Going down:  ~p", [Why]),
  	#state{callback = Callback, substate = Substate} = State,
  	Callback:terminate(Why, Substate).
  
  %% ------------------------------------------------------------------
  %% code_change
  %% ------------------------------------------------------------------
  