[Miguel]

Add this at the end of your code: http://pawn.pastebin.com/f263f249e

And:

pawn Код:

dcmd_login(playerid, params[])
{
  if(gPlayerInfo[playerid][PLAYER_REGGED] == 1)
  {
    if(gPlayerInfo[playerid][PLAYER_LOGGED] == 0)
    {
      new
        Password[81];

      if(sscanf(params, "s", Password)) return SendClientMessage(playerid, COLOR, "USAGE: /login [password]");
      else if(strmp(Password, gPlayerInfo[playerid][PLAYER_PASS], false) != 0) return SendClientMessage(playerid, COLOR, "ERROR: Incorrent password!");
      else 
      {
        gPlayerInfo[playerid][PLAYER_LOGGED] = 1;
        SendClientMessage(playerid, COLOUR, "You have successfully logged into your account!");
        OnPlayerLogin(playerid);        
      }    
    }
    else SendClientMessage(playerid, COLOR, "ERROR: You are already logged in!");
  }
  else SendClientMessage(playerid, COLOR, "ERROR: You must register first to do that! Use /register [password] to register and login.");
  return 1;
}

Remember to load/save the password into the variable gPlayerInfo[playerid][PLAYER_PASS] when registering and connecting to the server.