refactor: update authentication flow to use NextAuth, replace better-auth with axios for API calls, and clean up unused code

queries/atoll.ts

@@ -1,10 +0,0 @@
-"use server";
-
-import type { Atoll, DataResponse } from "@/lib/backend-types";
-
-export async function getAtollsWithIslands(): Promise<DataResponse<Atoll>> {
-	const response = await fetch(
-		`${process.env.SARLINK_API_BASE_URL}/api/auth/atolls`,
-	);
-	return response.json();
-}

queries/authentication.ts

@@ -0,0 +1,48 @@
+"use server";
+import type { TAuthUser } from "@/lib/types/user";
+import axiosInstance from "@/utils/axiosInstance";
+
+export async function login({
+	password,
+	username,
+}: {
+	username: string;
+	password: string;
+}): Promise<TAuthUser> {
+	const response = await axiosInstance
+		.post("/auth/login/", {
+			username: username,
+			password: password,
+		})
+		.then((res) => {
+			console.log(res);
+			return res.data; // Return the data from the response
+		})
+		.catch((err) => {
+			console.log(err.response);
+			throw err; // Throw the error to maintain the Promise rejection
+		});
+
+	return response;
+}
+
+export async function logout({ token }: { token: string }) {
+	const response = await fetch(
+		`${process.env.NEXT_PUBLIC_API_URL}/auth/logout/`,
+		{
+			method: "POST",
+			headers: {
+				"Content-Type": "application/json",
+				Authorization: `Token ${token}`, // Include the token for authentication
+			},
+		},
+	);
+
+	if (response.status !== 204) {
+		throw new Error("Failed to log out from the backend");
+	}
+	console.log("logout res in backend", response);
+
+	// Since the API endpoint returns 204 No Content on success, we don't need to parse JSON
+	return null; // Return null to indicate a successful logout with no content
+}