[Dairyll]

My suggestion is make a server-wide account counter. Then just increase it by one every successful registration.

Create the variable

pawn Код:

new
    PlayerAccounts;

Now load that variable every time you initiate the server. I'm not familiar with yini, but in dini, it went something like this:

pawn Код:

stock LoadAccountCounter()
{
    #define ACC_CTR_FILE "accounts.cfg"
    if(!fexist(ACC_CTR_FILE)) return 1;
    new
        File: i_FileHandle = fopen("accounts.cfg", io_read), sz_FileStr[16];
    fread(i_FileHandle, sz_FileStr);
    sscanf(sz_FileStr, "p<,>i", PlayerAccounts); // You can add multiple variables to this, see below
    return fclose(i_FileHandle);
}

Save the variable whenever you feel like it:

pawn Код:

stock SaveAccountCounter()
{
    new
        sz_FileStr[16], File: i_FileHandle = fopen(ACC_CTR_FILE, io_write);
    format(sz_FileStr, sizeof(sz_FileStr), "%d", PlayerAccounts);  // Add multiple variables separated with a comma
    fwrite(i_FileHandle, sz_FileStr);
    #undef ACC_CTR_FILE
    return fclose(i_FileHandle);
}

Now to increase the counter's variable by one every time a user successfully registers:

pawn Код:

case DIALOG_REGISTER:
        {
            if (!response) return Kick(playerid);
            if(response)
            {
                if(!strlen(inputtext)) return ShowPlayerDialog(playerid, DIALOG_REGISTER, DIALOG_STYLE_INPUT, "Register","You haven't entered anything. Please enter a password to Proceed.","Register","Quit");
                PlayerInfo[playerid][Password] = udb_hash(inputtext);
                SavePlayer(playerid);
                PlayerAccounts++; // ++ increases the counter
                
            }
        }

It's been awhile since I've touched non-MySQL systems so it might not be the best format. It should work though.