add auth service

luckydiamond/src/assets/js/rest/RestMethods.js

@@ -0,0 +1,21 @@
+export async function Post(url = "", data = {}) {
+    // Default options are marked with *
+    try {
+        const response = await fetch(url, {
+          method: "POST",
+          headers: {
+            "Content-Type": "application/json",
+          },
+          redirect: "follow",
+          referrerPolicy: "no-referrer",
+          body: JSON.stringify(data),
+        });
+        if (!response.ok) {
+          throw new Error(`HTTP error! status: ${response.status}`);
+        }
+        return await response.json();
+      } catch (error) {
+        console.log("Fetch error:", error);
+        throw error; // Re-throw the error so it can be caught by the calling function
+      }
+}