feat: add a way to get AccountType

This adds a way to get the logged in players account type.

runelite-api/src/main/java/net/runelite/api/Client.java

@@ -32,6 +32,7 @@ import javax.annotation.Nullable;
 import net.runelite.api.annotations.VisibleForDevtools;
 import net.runelite.api.coords.LocalPoint;
 import net.runelite.api.coords.WorldPoint;
+import net.runelite.api.vars.AccountType;
 import net.runelite.api.widgets.Widget;
 import net.runelite.api.widgets.WidgetInfo;
 
@@ -57,6 +58,11 @@ public interface Client extends GameEngine
 
 	void setUsername(String name);
 
+	/**
+	 * Gets the account type for the logged in player.
+	 */
+	AccountType getAccountType();
+
 	Canvas getCanvas();
 
 	int getFPS();

runelite-api/src/main/java/net/runelite/api/Varbits.java

@@ -339,7 +339,12 @@ public enum Varbits
 	/**
 	 * Automatically weed farming patches
 	 */
-	AUTOWEED(5557);
+	AUTOWEED(5557),
+
+	/**
+	 * The varbit that stores the players {@code AccountType}.
+	 */
+	ACCOUNT_TYPE(1777);
 
 	/**
 	 * varbit id

runelite-api/src/main/java/net/runelite/api/vars/AccountType.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2018, Joshua Filby <joshua@filby.me>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package net.runelite.api.vars;
+
+/**
+ * An enumeration of possible account types.
+ */
+public enum AccountType
+{
+	NORMAL,
+	IRONMAN,
+	ULTIMATE_IRONMAN,
+	HARDCORE_IRONMAN;
+
+	/**
+	 * Check if the {@code AccountType} is any of the possible ironman types.
+	 *
+	 * @return {@code true} if the type is any of the ironman types.
+	 */
+	public boolean isIronman()
+	{
+		return this.ordinal() >= IRONMAN.ordinal() && this.ordinal() <= HARDCORE_IRONMAN.ordinal();
+	}
+
+}

runelite-mixins/src/main/java/net/runelite/mixins/RSClientMixin.java

@@ -27,6 +27,7 @@ package net.runelite.mixins;
 import java.util.ArrayList;
 import java.util.List;
 import javax.annotation.Nullable;
+import net.runelite.api.vars.AccountType;
 import net.runelite.api.ChatMessageType;
 import net.runelite.api.ClanMember;
 import net.runelite.api.GameState;
@@ -160,6 +161,25 @@ public abstract class RSClientMixin implements RSClient
 		interpolateObjectAnimations = interpolate;
 	}
 
+	@Inject
+	@Override
+	public AccountType getAccountType()
+	{
+		int varbit = getVar(Varbits.ACCOUNT_TYPE);
+
+		switch (varbit)
+		{
+			case 1:
+				return AccountType.IRONMAN;
+			case 2:
+				return AccountType.ULTIMATE_IRONMAN;
+			case 3:
+				return AccountType.HARDCORE_IRONMAN;
+		}
+
+		return AccountType.NORMAL;
+	}
+
 	@Inject
 	@Override
 	public Tile getSelectedRegionTile()