diff --git a/LauncherAuthlib/src/main/java/com/mojang/authlib/GameProfile.java b/LauncherAuthlib/src/main/java/com/mojang/authlib/GameProfile.java
new file mode 100644
index 00000000..cc195f3e
--- /dev/null
+++ b/LauncherAuthlib/src/main/java/com/mojang/authlib/GameProfile.java
@@ -0,0 +1,86 @@
+package com.mojang.authlib;
+
+import com.mojang.authlib.properties.PropertyMap;
+import java.util.UUID;
+
+public class GameProfile {
+    private final UUID id;
+    private final String name;
+    private final PropertyMap properties = new PropertyMap();
+    private boolean legacy;
+
+    public GameProfile(UUID id, String name) {
+        if (id == null && isBlank(name)) {
+            throw new IllegalArgumentException("Name and ID cannot both be blank");
+        } else {
+            this.id = id;
+            this.name = name;
+        }
+    }
+
+    public UUID getUUID() {
+        return this.id;
+    }
+
+    public String getName() {
+        return this.name;
+    }
+
+    public PropertyMap getProperties() {
+        return this.properties;
+    }
+
+    public boolean isComplete() {
+        return this.id != null && isNotBlank(this.getName());
+    }
+
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o != null && this.getClass() == o.getClass()) {
+            GameProfile that = (GameProfile)o;
+            if (this.id != null) {
+                if (!this.id.equals(that.id)) {
+                    return false;
+                }
+            } else if (that.id != null) {
+                return false;
+            }
+
+            if (this.name != null) {
+                return this.name.equals(that.name);
+            } else return that.name == null;
+
+        } else {
+            return false;
+        }
+    }
+
+    public int hashCode() {
+        int result = this.id != null ? this.id.hashCode() : 0;
+        result = 31 * result + (this.name != null ? this.name.hashCode() : 0);
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return "GameProfile{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", properties=" + properties +
+                ", legacy=" + legacy +
+                '}';
+    }
+
+    public boolean isLegacy() {
+        return this.legacy;
+    }
+
+    private static boolean isBlank(String s) {
+        return s == null || s.chars().allMatch(Character::isWhitespace);
+    }
+
+    private static boolean isNotBlank(String s) {
+        return !isBlank(s);
+    }
+}
\ No newline at end of file