String rankName = "myAwesomeRank";
String playerName = "svenar";
for (Player onlinePlayer : Bukkit.getServer().getOnlinePlayers()) {
if (onlinePlayer.getName().equals(playerName)) {
boolean success = api.addPlayerRank(player, rankName);
System.out.println("The rank has been granted to " + player.getName());
System.out.println("Failed to give the rank '" + rankName + "' to " + player.getName());
System.out.println("Player is offline");