[Supremache]

Try this:

#include <amxmodx>

new g_ShowHud[ 33 ] = true;

public plugin_init() {
    register_clcmd( "say /hud", "cmdShowHud" );
}

// Toggle Showing Hud Message On / Off
public cmdShowHud( id ) {
    g_ShowHud[ id ] = !g_ShowHud[ id ];
    return PLUGIN_HANDLED;
}

public client_putinserver( id ) {
    g_ShowHud[ id ] = true;
    set_task( 0.9, "ShowHud", id, _, _, "b" );
}

public ShowHud( id ) {
    if( g_ShowHud[ id ] ) {
        
        new szServerIP[ 64 ], szHostName[ 64 ]
        get_user_ip(0, szServerIP, charsmax(szServerIP))
        get_cvar_string("hostname", szHostName, charsmax(szHostName)) 
    
        set_hudmessage(6, 70, 199, 0.0, 0.21, 0, 6.0, 1.1)
        show_hudmessage(0, "Server: %s^nIP: %s", szHostName, szServerIP);
    }

}