[Threshold]

There is a quicker way, yes.

pawn Code:

if(pInfo[playerid][Spawned] == 0)
{
        if(strcmp(cmdtext,"/admins",true) == 0) return 1;
        SendClientMessage(playerid, -1, "You have to be logged in.");
        return 0;
}

Lets say you want to unblock /admins, /rules and the /help commands:

pawn Code:

if(pInfo[playerid][Spawned] == 0)
{
        if(strcmp(cmdtext,"/admins",true) == 0) return 1;
        if(strcmp(cmdtext,"/rules",true) == 0) return 1;
        if(strcmp(cmdtext,"/help",true) == 0) return 1;
        SendClientMessage(playerid, -1, "You have to be logged in.");
        return 0;
}

OR:

pawn Code:

if(pInfo[playerid][Spawned] == 0)
{
        if(strcmp(cmdtext,"/admins",true) == 0 || strcmp(cmdtext,"/rules",true) == 0 || strcmp(cmdtext,"/help",true) == 0) return 1;
        SendClientMessage(playerid, -1, "You have to be logged in.");
        return 0;
}