Added users and leaderboard.

Scripts/Garden/Users.js

@@ -0,0 +1,127 @@
+async function GetProfile() {
+    const Response = await fetch(
+        ApiUrl + "/Profile.php",
+        {
+            method: "POST",
+
+            headers: {
+                "Content-Type": "application/json"
+            },
+
+            body: JSON.stringify({
+                SaveKey: GetSaveKey()
+            })
+        }
+    );
+
+    return await Response.json();
+}
+
+
+async function SetUsername(
+    Username
+) {
+    const Response = await fetch(
+        ApiUrl + "/SetUsername.php",
+        {
+            method: "POST",
+
+            headers: {
+                "Content-Type": "application/json"
+            },
+
+            body: JSON.stringify({
+                SaveKey: GetSaveKey(),
+                Username: Username
+            })
+        }
+    );
+
+    return await Response.json();
+}
+
+
+async function RenderUser() {
+    const Profile =
+        await GetProfile();
+
+    const UsernameDisplay =
+        document.getElementById(
+            "UsernameDisplay"
+        );
+
+    const UsernameForm =
+        document.getElementById(
+            "UsernameForm"
+        );
+
+    if (
+        Profile.Success &&
+        Profile.Username !== null
+    ) {
+        UsernameDisplay.textContent =
+            Profile.Username;
+
+        UsernameForm.hidden = true;
+
+        return;
+    }
+
+    UsernameDisplay.textContent =
+        "Unnamed";
+
+    UsernameForm.hidden = false;
+}
+
+
+async function SubmitUsername(
+    Event
+) {
+    Event.preventDefault();
+
+    const Input =
+        document.getElementById(
+            "UsernameInput"
+        );
+
+    const Message =
+        document.getElementById(
+            "UsernameMessage"
+        );
+
+    const Result =
+        await SetUsername(
+            Input.value
+        );
+
+    if (!Result.Success) {
+        Message.textContent =
+            Result.Error;
+
+        return;
+    }
+
+    Message.textContent =
+        "Username set.";
+
+    await RenderUser();
+    await RenderLeaderboard();
+}
+
+
+document.addEventListener(
+    "DOMContentLoaded",
+    () => {
+        const UsernameForm =
+            document.getElementById(
+                "UsernameForm"
+            );
+
+        if (UsernameForm !== null) {
+            UsernameForm.addEventListener(
+                "submit",
+                SubmitUsername
+            );
+        }
+    }
+);