[fatal_nl]

Below is my code with another update (writing logs in seperate folder). I don't know exactly what I can move to plugin_init and what should be kept in client_connect. Keeping in mind that the server can be started on the last day of the month and a player connects on the first day of a new month. Then it should write to a new log file.

#include <amxmodx>
#include <amxmisc>
#include <geoip>

new szName[32], szIP[17], szID[25], szCountry[41]

public plugin_init()
{
    register_plugin("AllinfoIP", "1.12b", "fatal")
}

public client_connect(id)
{
    new AmxxLogsDir[20], LogFilesDir[28], LogFileName[28], LogFile[56]
    
    get_localinfo("amxx_logs", AmxxLogsDir, charsmax(AmxxLogsDir))
    
    formatex(LogFilesDir, charsmax(LogFilesDir), "%s/allinfo", AmxxLogsDir)
    
    if(!dir_exists(LogFilesDir))
        mkdir(LogFilesDir)
    
    get_time("allinfo_players_%m_%Y.txt", LogFileName, charsmax(LogFileName))
    
    formatex(LogFile, charsmax(LogFile), "%s/%s", LogFilesDir, LogFileName)
    
    get_user_name(id, szName, charsmax(szName))
    get_user_authid(id, szID, charsmax(szID))
    get_user_ip(id, szIP, charsmax(szIP), 1)
    geoip_country(szIP, szCountry, charsmax(szCountry))
    
    if (!is_user_bot(id))
    {
        log_to_file(LogFile, "     %s  |  %s  |  %s  |  %s", szName, szIP, szID, szCountry)
    }
    
    return PLUGIN_HANDLED
}

And this is the complete code with some of your suggestion implemented if I understood what you meant. I need confirmation from a more experienced coder if I did this right:

#include <amxmodx>
#include <amxmisc>
#include <geoip>

#define ADMIN ADMIN_LEVEL_G     // Custom admin level

new AmxxLogsDir[20], LogFilesDir[28], LogFileName[28], LogFile[56], iPlayers[32], iPlayerNum, szName[32], szIP[17], szID[25], szCountry[41]

public plugin_init()
{
    register_plugin("AllinfoIP", "1.12b", "fatal")
    register_concmd("amx_allinfo", "cmd_allinfo", ADMIN, "- All info..")
    
    get_localinfo("amxx_logs", AmxxLogsDir, charsmax(AmxxLogsDir))
    
    formatex(LogFilesDir, charsmax(LogFilesDir), "%s/allinfo", AmxxLogsDir)
    
    if(!dir_exists(LogFilesDir))
        mkdir(LogFilesDir)
}

public client_connect(id)
{
    get_time("allinfo_players_%m_%Y.txt", LogFileName, charsmax(LogFileName))
    
    formatex(LogFile, charsmax(LogFile), "%s/%s", LogFilesDir, LogFileName)
    
    get_user_name(id, szName, charsmax(szName))
    get_user_authid(id, szID, charsmax(szID))
    get_user_ip(id, szIP, charsmax(szIP), 1)
    geoip_country(szIP, szCountry, charsmax(szCountry))
    
    if (!is_user_bot(id))
    {
        log_to_file(LogFile, "     %s  |  %s  |  %s  |  %s", szName, szIP, szID, szCountry)
    }
    
    get_players(iPlayers, iPlayerNum)
    
    for (new i = 0; i < iPlayerNum; i++)
    {
        if (access(iPlayers[i], ADMIN))
        {
            if (!is_user_bot(id))
            {
                client_print(iPlayers[i], print_chat, "%s connected :  %s : %s : %s", szName, szID, szIP, szCountry)
            }
            else
            {
                client_print(iPlayers[i], print_chat, "%s connected :  %s", szName, szID)
            }
        }
    }
    
    return PLUGIN_HANDLED
}

public client_disconnect(id)
{
    get_user_name(id, szName, charsmax(szName))
    get_user_authid(id, szID, charsmax(szID))
    get_user_ip(id, szIP, charsmax(szIP), 1)
    get_players(iPlayers, iPlayerNum)
    
    for (new i = 0; i < iPlayerNum; i++)
    {
        if (access(iPlayers[i], ADMIN))
        {
            if (!is_user_bot(id))
            {
                client_print(iPlayers[i], print_chat, "%s disconnected :  %s : %s", szName, szID, szIP)
            }
            else
            {
                client_print(iPlayers[i], print_chat, "%s disconnected :  %s", szName, szID)
            }
        }
    }
    
    return PLUGIN_HANDLED
}

public cmd_allinfo(id, level, cid)
{
    if (!cmd_access(id, level, cid, 1))
    {
        console_print(id, "You have no access to this command!")
        
        return PLUGIN_HANDLED
    }
    
    get_players(iPlayers, iPlayerNum, "ch")
    
    for (new i = 0; i < iPlayerNum; i++)
    {
        get_user_name(iPlayers[i], szName, charsmax(szName))
        get_user_ip(iPlayers[i], szIP, charsmax(szIP), 1)
        get_user_authid(iPlayers[i], szID, charsmax(szID))
        geoip_country(szIP, szCountry, charsmax(szCountry))
        
        console_print(id, "%s  |  %s  |  %s  |  %s", szName, szIP, szID, szCountry)
    }
    
    return PLUGIN_HANDLED
}