anchor.diff:  		  {auth,     usmHMACMD5AuthProtocol},
   		  {auth_key, [1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6]},
   		  {priv,     usmNoPrivProtocol}],
  +
       ?line ok = snmpm_config:register_usm_user(EngineID, UserName1, UsmConfig1),
       ?IPRINT("try register user 1 again (error)"),
       ?line {error, {already_registered, EngineID, UserName1}} = 
  
positive.code: 		  {auth_key, [1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6]},
  		  {priv,     usmNoPrivProtocol}],
      ?line ok = snmpm_config:register_usm_user(EngineID, UserName3, UsmConfig3),
      
      ?IPRINT("lookup 1 (ok)"),
      ?line {ok, #usm_user{name = UserName1} = User1} = 
  	snmpm_config:get_usm_user_from_sec_name(EngineID, SecName1),
  
negative.code:     ?IPRINT("start"),
      process_flag(trap_exit, true),
  
      ?IPRINT("Start crypto and ensure support"),
      case ?CRYPTO_START() of
          ok ->
              case ?CRYPTO_SUPPORT() of
  