Copypaste into OnPlayerCommandText
if(!strcmp(cmdtext, "/duty", true) )
{
new Float:position[3];
GetPlayerPos(playerid, position[0]. position[1], position[2]);
CreatePlayerObject(playerid, -1, position[0], position[1], position[2], 0.0, 0.0, 0.0);
return 1;
}
it should work perfectly