frontlisterd

So I was told that "only one string" needed to change for this 1.8.9 mod to become a 1.16.5 mod. Im not very sure what this line is as I am new to this coding thing, so I thought I might ask around. Thanks in advance. Here is pt.1 of the code: package studio.dreamys.gui; import com.google.gson.JsonObject; import com.google.gson.JsonParser; import java.awt.Color; import java.io.IOException; import java.net.HttpURLConnection; import java.net.URL; import net.minecraft.client.gui.GuiButton; import net.minecraft.client.gui.GuiScreen; import net.minecraft.client.gui.GuiTextField; import net.minecraft.client.gui.ScaledResolution; import net.minecraft.util.Session; import org.apache.commons.io.IOUtils; import org.lwjgl.input.Keyboard; import studio.dreamys.TokenAuth; public class SessionGui extends GuiScreen { private GuiScreen previousScreen; private String status = "Session:"; private GuiTextField sessionField; private ScaledResolution sr; public SessionGui(GuiScreen previousScreen) { this.previousScreen = previousScreen; } public void func_73866_w_() { Keyboard.enableRepeatEvents(true); this.sr = new ScaledResolution(this.field_146297_k); this.sessionField = new GuiTextField(1, this.field_146297_k.field_71466_p, this.sr.func_78326_a() / 2 - 100, this.sr.func_78328_b() / 2, 200, 20); this.sessionField.func_146203_f(32767); this.sessionField.func_146195_b(true); this.field_146292_n.add(new GuiButton(998, this.sr.func_78326_a() / 2 - 100, this.sr.func_78328_b() / 2 + 30, 200, 20, "Login")); this.field_146292_n.add(new GuiButton(999, this.sr.func_78326_a() / 2 - 100, this.sr.func_78328_b() / 2 + 60, 200, 20, "Restore")); super.func_73866_w_(); } public void func_146281_b() { Keyboard.enableRepeatEvents(false); super.func_146281_b(); } public void func_73863_a(int mouseX, int mouseY, float partialTicks) { this.func_146276_q_(); this.field_146297_k.field_71466_p.func_78276_b(this.status, this.sr.func_78326_a() / 2 - this.field_146297_k.field_71466_p.func_78256_a(this.status) / 2, this.sr.func_78328_b() / 2 - 30, Color.WHITE.getRGB()); this.sessionField.func_146194_f(); super.func_73863_a(mouseX, mouseY, partialTicks); } protected void func_146284_a(GuiButton button) throws IOException { if (button.field_146127_k == 998) { try { String session = this.sessionField.func_146179_b(); String username; String uuid; String token; if (session.contains(":")) { username = session.split(":")[0]; uuid = session.split(":")[1]; token = session.split(":")[2]; } else { HttpURLConnection c = (HttpURLConnection)(new URL("https://api.minecraftservices.com/minecraft/profile/")).openConnection(); c.setRequestProperty("Content-type", "application/json"); c.setRequestProperty("Authorization", "Bearer " + this.sessionField.func_146179_b()); c.setDoOutput(true); JsonObject json = (new JsonParser()).parse(IOUtils.toString(c.getInputStream())).getAsJsonObject(); username = json.get("name").getAsString(); uuid = json.get("id").getAsString(); token = session; } this.field_146297_k.field_71449_j = new Session(username, uuid, token, "mojang"); this.field_146297_k.func_147108_a(this.previousScreen); } catch (Exception var9) { this.status = "§cError: Couldn't set session (check mc logs)"; var9.printStackTrace(); } } if (button.field_146127_k == 999) { try { this.field_146297_k.field_71449_j = TokenAuth.originalSession; this.field_146297_k.func_147108_a(this.previousScreen); } catch (Exception var8) { this.status = "§cError: Couldn't restore session (check mc logs)"; var8.printStackTrace(); } } super.func_146284_a(button); } protected void func_73869_a(char typedChar, int keyCode) throws IOException { this.sessionField.func_146201_a(typedChar, keyCode); if (1 == keyCode) { this.field_146297_k.func_147108_a(this.previousScreen); } else { super.func_73869_a(typedChar, keyCode); } } } and heres pt.2 : package studio.dreamys; import java.awt.Color; import net.minecraft.client.Minecraft; import net.minecraft.client.gui.GuiButton; import net.minecraft.client.gui.GuiMultiplayer; import net.minecraft.util.Session; import net.minecraftforge.client.event.GuiScreenEvent; import net.minecraftforge.common.MinecraftForge; import net.minecraftforge.fml.common.Mod; import net.minecraftforge.fml.common.Mod.EventHandler; import net.minecraftforge.fml.common.event.FMLPreInitializationEvent; import net.minecraftforge.fml.common.eventhandler.SubscribeEvent; import studio.dreamys.gui.SessionGui; @Mod( modid = "ta", name = "TokenAuth", version = "1.1.0" ) public class TokenAuth { public static Minecraft mc = Minecraft.func_71410_x(); public static Session originalSession; public TokenAuth() { } @EventHandler public void preInit(FMLPreInitializationEvent e) { MinecraftForge.EVENT_BUS.register(this); } @SubscribeEvent public void onInitGuiPost(GuiScreenEvent.InitGuiEvent.Post e) { if (e.gui instanceof GuiMultiplayer) { e.buttonList.add(new GuiButton(999, 5, 5, 100, 20, "TokenAuth")); } } @SubscribeEvent public void onDrawScreenPost(GuiScreenEvent.DrawScreenEvent.Post e) { if (e.gui instanceof GuiMultiplayer) { String status = String.format("User: §a%s §rUUID: §a%s", mc.field_71449_j.func_111285_a(), mc.field_71449_j.func_148255_b()); Minecraft.func_71410_x().field_71466_p.func_78276_b(status, 115, 10, Color.WHITE.getRGB()); } } @SubscribeEvent public void onActionPerformedPre(GuiScreenEvent.ActionPerformedEvent.Pre e) { if (e.gui instanceof GuiMultiplayer && e.button.field_146127_k == 999) { Minecraft.func_71410_x().func_147108_a(new SessionGui(e.gui)); } } static { originalSession = mc.field_71449_j; } }