// This line is the equivalent of new PlayerInfo[MAX_PLAYERS][pInfo]
local playerData = {};

function onPlayerConnect(playerid) {
    // however, in PAWN the variables used in playerData are declared before intializing the variable
    // in Squirrel, the variables are declared (or created) when we are adding a new row

    playerData[playerid] <- {}; // this creates the new row
    playerData[playerid].money <- 500; // this is an example field

    // note that I use <- instead of playerData[playerid].500.
    // the <- symbolizes the adding of a new field, but once the field is created you access it like
    // playerData[playerid].money = 10;
}
addEvent("playerConnect", onPlayerConnect);

function onPlayerDisconnect(playerid) {
    // when the player disconnects, we want to remove the information about them that was stored serverside
    delete playerData[playerid];
}
addEvent("playerDisconnect", onPlayerDisconnect);