diff --git a/package.json b/package.json
index 4cfe832..bbabeff 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,10 @@
 	"license": "UNLICENSED",
 	"private": true,
 	"type": "module",
+	"scripts": {
+		"start:backend": "bun run packages/backend/src/index.ts",
+		"start:frontend": "pnpm --filter frontend exec vite --open"
+	},
 	"devDependencies": {
 		"typescript": "catalog:"
 	}
diff --git a/packages/backend/src/app.ts b/packages/backend/src/app.ts
index 40f33ea..4b401ba 100644
--- a/packages/backend/src/app.ts
+++ b/packages/backend/src/app.ts
@@ -1,6 +1,7 @@
 import { Schema as S } from "@effect/schema";
-import { Login } from "common/api";
-import { AccessLog } from "common/db";
+import { SessionId } from "common";
+import { Login, Me } from "common/api";
+import { AccessLog, SessionData } from "common/db";
 import { DateTime, Duration, Either as E, Effect, Match, Option as O, pipe } from "effect";
 import { Api } from "make-api";
 import { brotliCompress } from "node:zlib";
@@ -24,7 +25,8 @@ const match = (api: Api.Api.Any) => Effect.gen(function* () {
 		));
 });
 
-const WEIGHTED_TOKEN_REGEX = /^([!#$%'*+.^_`|~a-z0-9-])\s*(?:;\s*q=(0(?:\.[0-9]{0,3})?|1(?:\.0{0,3})?))?$/i;
+const COOKIE_REGEX = /^([!#$%'*+.^_`|~a-z0-9-]+)\s*=\s*([!#$%&'()*+./:<=>?@[\]^_`{|}~a-z0-9-]+)/i;
+const WEIGHTED_TOKEN_REGEX = /^([!#$%'*+.^_`|~a-z0-9-]+)\s*(?:;\s*q=(0(?:\.[0-9]{0,3})?|1(?:\.0{0,3})?))?$/i;
 
 const acceptsBrotli = Effect.gen(function* () {
 	const req = yield* Request;
@@ -48,7 +50,7 @@ const acceptsBrotli = Effect.gen(function* () {
 		.split(/\s*,\s*/)
 		.map((token) => token.match(WEIGHTED_TOKEN_REGEX))
 		.filter((match) => match !== null)
-		.map((match) => Object.freeze({
+		.map((match) => ({
 			coding: match[1],
 			...(match[2] ? { quality: Number.parseFloat(match[2]) } : undefined),
 		}));
@@ -56,6 +58,24 @@ const acceptsBrotli = Effect.gen(function* () {
 	return codings.some(({ coding, quality = 1 }) => coding === "br" && quality > 0);
 });
 
+const getCookie = (name: string): Effect.Effect<O.Option<string>, never, Request> => Effect.gen(function* () {
+	const req = yield* Request;
+
+	const cookieString = req.headers["cookie"];
+
+	if (!cookieString) {
+		return O.none();
+	}
+
+	const cookieValue = cookieString
+		.split(/\s*;\s*/)
+		.map((cookie) => cookie.match(COOKIE_REGEX))
+		.filter((match): match is RegExpMatchArray => match !== null && match[1] === name)
+		.map((match) => match[2])[0];
+
+	return O.fromNullable(cookieValue);
+});
+
 const requestJson = <A, I, R>(schema: S.Schema<A, I, R>) => {
 	const decoder = S.decodeUnknown(schema);
 	return pipe(
@@ -66,7 +86,7 @@ const requestJson = <A, I, R>(schema: S.Schema<A, I, R>) => {
 		),
 		Effect.flatMap((req) => req.json),
 		Effect.flatMap(decoder),
-		Effect.mapError((error) => new RequestError({ status: 400, body: error.message }))
+		Effect.mapError((error) => new RequestError({ status: 400, body: error.message })),
 	);
 };
 
@@ -87,7 +107,8 @@ export const app = pipe(
 			ip: O.getOrNull(req.ip),
 		});
 
-		console.log(JSON.stringify(accessLog));
+		yield* db.createAccessLog(accessLog);
+		console.log(`${DateTime.toDateUtc(accessLog.timestamp).toISOString()} ${accessLog.requestId} ${accessLog.method} ${accessLog.pathname}?${new URLSearchParams(accessLog.query).toString()} ${accessLog.ip}`);
 
 		if (yield* match(Login)) {
 
@@ -103,7 +124,8 @@ export const app = pipe(
 				return yield* new RequestError({ status: 401, body: "Invalid username or password" });
 			}
 
-			const sessionId = yield* db.createSession(user.userId);
+			const sessionData = SessionData.make({ userId: user.userId });
+			const sessionId = yield* db.createSession(sessionData);
 
 			const responseData = Login.props.response[200].schema.make({
 				userId: user.userId,
@@ -119,7 +141,91 @@ export const app = pipe(
 			const responseArray = new TextEncoder().encode(responseJson);
 
 			const expiresAt = DateTime.addDuration(yield* DateTime.now, Duration.days(7));
-			const setCookie = `sessionId=${sessionId}; Expires=${DateTime.toDateUtc(expiresAt).toUTCString()}; HttpOnly; Secure`;
+			const setCookie = `sessionId=${sessionId}; Expires=${DateTime.toDateUtc(expiresAt).toUTCString()}; HttpOnly; SameSite=None; Secure`;
+
+			if (yield* acceptsBrotli) {
+				const responseBrotli = yield* Effect.async<Buffer>((callback) => {
+					brotliCompress(responseArray, (error, result) => {
+						if (error !== null) {
+							callback(Effect.die(error));
+						} else {
+							callback(Effect.succeed(result));
+						}
+					});
+				});
+				return new Response(responseBrotli, {
+					headers: {
+						"Content-Encoding": "br",
+						"Content-Length": responseArray.byteLength.toString(),
+						"Content-Type": "application/json",
+						"Set-Cookie": setCookie,
+					},
+				});
+			} else {
+				return new Response(responseArray, {
+					headers: {
+						"Content-Length": responseArray.byteLength.toString(),
+						"Content-Type": "application/json",
+						"Set-Cookie": setCookie,
+					}
+				});
+			}
+		} else if (yield* match(Me)) {
+
+			const sessionId = yield* pipe(
+				getCookie("sessionId"),
+				Effect.flatten,
+				Effect.flatMap(S.decodeUnknown(SessionId)),
+				Effect.mapError(() => new RequestError({ status: 401, body: "Session invalid or expired" })),
+			);
+
+			const sessionData = yield* pipe(
+				db.getAndRefreshSessionData(sessionId),
+				Effect.optionFromOptional,
+				Effect.map(O.getOrNull),
+			);
+
+			if (sessionData === null) {
+				const setCookie = `sessionId=; Expires=${new Date(0).toUTCString()}; HttpOnly; SameSite=None; Secure`;
+				return new Response(null, {
+					status: 401,
+					headers: {
+						"Set-Cookie": setCookie,
+					},
+				});
+			}
+
+			const user = yield* pipe(
+				db.getUserById(sessionData.userId),
+				Effect.optionFromOptional,
+				Effect.map(O.getOrNull),
+			);
+
+			if (user === null) {
+				const setCookie = `sessionId=; Expires=${new Date(0).toUTCString()}; HttpOnly; SameSite=None; Secure`;
+				return new Response(null, {
+					status: 401,
+					headers: {
+						"Set-Cookie": setCookie,
+					},
+				});
+			}
+
+			const responseData = Me.props.response[200].schema.make({
+				userId: user.userId,
+				username: user.username,
+				admin: user.admin,
+			});
+
+			const responseJson = yield* pipe(
+				responseData,
+				S.encode(Me.props.response[200].schema),
+				Effect.map(JSON.stringify),
+			);
+			const responseArray = new TextEncoder().encode(responseJson);
+
+			const expiresAt = DateTime.addDuration(yield* DateTime.now, Duration.days(7));
+			const setCookie = `sessionId=${sessionId}; Expires=${DateTime.toDateUtc(expiresAt).toUTCString()}; HttpOnly; SameSite=None; Secure`;
 
 			if (yield* acceptsBrotli) {
 				const responseBrotli = yield* Effect.async<Buffer>((callback) => {
diff --git a/packages/backend/src/services/database.ts b/packages/backend/src/services/database.ts
index 3b395d5..84a4913 100644
--- a/packages/backend/src/services/database.ts
+++ b/packages/backend/src/services/database.ts
@@ -1,7 +1,7 @@
 import { Schema as S } from "@effect/schema";
 import { Database as SqliteDatabase } from "bun:sqlite";
 import { SessionId, UserId } from "common";
-import { User } from "common/db";
+import { AccessLog, SessionData, User } from "common/db";
 import { Context, Effect, Layer, pipe } from "effect";
 import { NoSuchElementException } from "effect/Cause";
 import { ulid } from "ulid";
@@ -14,8 +14,14 @@ export function generateSessionId(byteLength: number = 12): SessionId {
 }
 
 export interface DatabaseInterface {
+	readonly createAccessLog: (accessLog: AccessLog) => Effect.Effect<void>;
+
 	readonly getUserByUsername: (username: string) => Effect.Effect<User, NoSuchElementException>;
-	readonly createSession: (userId: UserId) => Effect.Effect<SessionId>;
+	readonly getUserById: (userId: UserId) => Effect.Effect<User, NoSuchElementException>;
+
+	readonly createSession: (sessionData: SessionData) => Effect.Effect<SessionId>;
+	readonly getAndRefreshSessionData: (sessionId: SessionId) => Effect.Effect<SessionData, NoSuchElementException>;
+	readonly deleteSession: (sessionId: SessionId) => Effect.Effect<void>;
 }
 
 export class Database extends Context.Tag("Database")<Database, DatabaseInterface>() { }
@@ -85,23 +91,64 @@ export const DatabaseLive = (filePath: string = "db.sqlite3") => Layer.effect(Da
 		}
 	})),
 	Effect.map((db) => {
-		const getUserByUsername = db.prepare("SELECT userId, username, password, admin FROM User WHERE username = ?");
-		const cleanupSessions = db.prepare("DELETE FROM Session WHERE expiresAt >= datetime()");
-		const createSession = db.prepare("INSERT INTO Session (sessionId, userId, expiresAt) VALUES (?, ?, datetime('now', '+7 days'))");
-		const updateSession = db.prepare("UPDATE Session SET expiresAt = datetime('now', '+7 days') WHERE sessionId = ?");
+		const createAccessLog = db.prepare<
+			never,
+			[timestamp: string, requestId: string, method: string, pathname: string, query: string, ip: string | null]
+		>("INSERT INTO AccessLog (timestamp, requestId, method, pathname, query, ip) VALUES (?, ?, ?, ?, ?, ?)");
+
+		const getUserByUsername = db.prepare<
+			{ userId: string, username: string, password: string, admin: number },
+			[username: string]
+		>("SELECT userId, username, password, admin FROM User WHERE username = ?");
+		const getUserById = db.prepare<
+			{ userId: string, username: string, password: string, admin: number },
+			[userId: UserId]
+		>("SELECT userId, username, password, admin FROM User WHERE userId = ?");
+
+		const cleanupSessions = db.prepare<never, []>("DELETE FROM Session WHERE datetime() >= expiresAt");
+		const createSession = db.prepare<
+			never,
+			[sessionId: SessionId, userId: UserId]
+		>("INSERT INTO Session (sessionId, userId, expiresAt) VALUES (?, ?, datetime('now', '+7 days'))");
+		const updateSession = db.prepare<typeof SessionData.Encoded, [sessionId: SessionId]>("UPDATE Session SET expiresAt = datetime('now', '+7 days') WHERE sessionId = ? RETURNING userId");
+		const deleteSession = db.prepare<never, [sessionId: SessionId]>("DELETE FROM Session WHERE sessionId = ?");
 
 		return Object.freeze<DatabaseInterface>({
+			createAccessLog: (accessLog) => Effect.sync(() => {
+				const { timestamp, requestId, method, pathname, query, ip } = S.encodeSync(AccessLog)(accessLog);
+				createAccessLog.run(timestamp, requestId, method, pathname, query, ip);
+			}),
+
 			getUserByUsername: (username) => Effect.suspend(() => {
 				const res = getUserByUsername.get(username);
 				if (res === null) return Effect.fail(new NoSuchElementException());
-				return Effect.succeed(S.decodeUnknownSync(User)(res));
+				return Effect.succeed(S.decodeSync(User)(res));
 			}),
 
-			createSession: (userId) => Effect.sync(() => {
+			getUserById: (userId) => Effect.suspend(() => {
+				const res = getUserById.get(userId);
+				if (res === null) return Effect.fail(new NoSuchElementException());
+				return Effect.succeed(S.decodeSync(User)(res));
+			}),
+
+			createSession: ({ userId }) => Effect.sync(() => {
+				cleanupSessions.run();
 				const sessionId = generateSessionId();
 				createSession.run(sessionId, userId);
 				return sessionId;
 			}),
+
+			getAndRefreshSessionData: (sessionId) => Effect.suspend(() => {
+				cleanupSessions.run();
+				const res = updateSession.get(sessionId);
+				if (res === null) return Effect.fail(new NoSuchElementException());
+				return Effect.succeed(S.decodeUnknownSync(SessionData)(res));
+			}),
+
+			deleteSession: (sessionId) => Effect.sync(() => {
+				cleanupSessions.run();
+				deleteSession.run(sessionId);
+			}),
 		});
 	}),
 ));
diff --git a/packages/common/src/api.ts b/packages/common/src/api.ts
index 4cc6137..6eab794 100644
--- a/packages/common/src/api.ts
+++ b/packages/common/src/api.ts
@@ -17,3 +17,13 @@ export const Login = pipe(
 	Api.responseBodyText(400, S.String),
 	Api.responseBodyText(401, S.String),
 );
+
+export const Me = pipe(
+	Api.make("GET", "me"),
+	Api.responseBodyJson(200, S.Struct({
+		userId: UserId,
+		username: S.NonEmptyString,
+		admin: S.Boolean,
+	})),
+	Api.responseBodyText(401, S.String),
+);
diff --git a/packages/common/src/db.ts b/packages/common/src/db.ts
index 5c04854..93d6fc1 100644
--- a/packages/common/src/db.ts
+++ b/packages/common/src/db.ts
@@ -2,6 +2,12 @@ import { Schema as S } from "@effect/schema";
 import { AttachmentId, BooleanFromNumber, PieceId, RequestId, SessionId, Sha256, UserId } from "common";
 import { Brand as B, pipe } from "effect";
 
+export const SessionData = S.Struct({
+	userId: UserId,
+});
+
+export type SessionData = typeof SessionData.Type;
+
 export const SystemInformation = S.Struct({
 	createdBy: S.Union(UserId, S.Null),
 	createdAt: S.DateTimeUtc,
@@ -47,11 +53,13 @@ export const Piece = pipe(
 	S.extend(SystemInformation),
 );
 
-export const Session = S.Struct({
-	sessionId: SessionId,
-	userId: UserId,
-	expiresAt: S.DateTimeUtc,
-});
+export const Session = pipe(
+	S.Struct({
+		sessionId: SessionId,
+		expiresAt: S.DateTimeUtc,
+	}),
+	S.extend(SessionData),
+);
 
 export const User = S.Struct({
 	userId: UserId,
diff --git a/packages/frontend/src/App.tsx b/packages/frontend/src/App.tsx
index 366018d..efbb802 100644
--- a/packages/frontend/src/App.tsx
+++ b/packages/frontend/src/App.tsx
@@ -1,7 +1,6 @@
-import { ErrorBoundary, lazy, LocationProvider, Route, Router } from "preact-iso";
-
-const Home = lazy(() => import("./routes/Home"));
-const Login = lazy(() => import("./routes/Login"));
+import { ErrorBoundary, LocationProvider, Route, Router } from "preact-iso";
+import { Home } from "./routes/Home";
+import { Login } from "./routes/Login";
 
 export const App = () => (
 	<LocationProvider>
diff --git a/packages/frontend/src/routes/Home.css.ts b/packages/frontend/src/routes/Home.css.ts
new file mode 100644
index 0000000..fb1f5b0
--- /dev/null
+++ b/packages/frontend/src/routes/Home.css.ts
@@ -0,0 +1,18 @@
+import { style } from "@vanilla-extract/css";
+
+export const container = style({
+	width: 800,
+	maxWidth: "100%",
+
+	margin: "0 auto",
+});
+
+export const loading = style({
+	padding: 8,
+
+	textAlign: "center",
+});
+
+export const content = style({
+	padding: 8,
+});
diff --git a/packages/frontend/src/routes/Home.tsx b/packages/frontend/src/routes/Home.tsx
index 461f67a..ce75e97 100644
--- a/packages/frontend/src/routes/Home.tsx
+++ b/packages/frontend/src/routes/Home.tsx
@@ -1 +1,59 @@
-export default () => null;
+import { Schema as S } from "@effect/schema";
+import { Me } from "common/api";
+import { Effect, Fiber, Option as O, Option, pipe } from "effect";
+import { useLocation } from "preact-iso";
+import { useEffect } from "preact/hooks";
+import { useStore } from "../store";
+import * as style from "./Home.css";
+
+export const Home = () => {
+
+	const { route } = useLocation();
+
+	const user = Option.getOrNull(useStore(state => state.user));
+	const setUser = useStore(state => state.setUser);
+
+	useEffect(() => {
+		if (user !== null) return;
+
+		const effect = Effect.gen(function* () {
+			const res = yield* Effect.promise((signal) => fetch("http://localhost:3000/me", {
+				method: "GET",
+				signal,
+				credentials: "include",
+			}));
+
+			if (!res.ok) {
+				route("/login");
+				return;
+			}
+
+			const responseData = yield* pipe(
+				Effect.promise(() => res.json()),
+				Effect.flatMap(S.decodeUnknown(Me.props.response[200].schema)),
+				Effect.orDie,
+			);
+
+			setUser(O.some(responseData));
+		});
+
+		const fiber = Effect.runFork(effect);
+		return () => Effect.runFork(Fiber.interrupt(fiber), { immediate: true });
+	}, []);
+
+	if (user === null) {
+		return (
+			<div class={style.container}>
+				<div class={style.loading}>Ładowanie…</div>
+			</div>
+		);
+	}
+
+	return (
+		<div class={style.container}>
+			<div class={style.content}>
+				Użytkownik: {user.username}
+			</div>
+		</div>
+	);
+};
diff --git a/packages/frontend/src/routes/Login.tsx b/packages/frontend/src/routes/Login.tsx
index 6a22105..ef90b0f 100644
--- a/packages/frontend/src/routes/Login.tsx
+++ b/packages/frontend/src/routes/Login.tsx
@@ -1,11 +1,14 @@
 import { Schema as S } from "@effect/schema";
-import { Login } from "common/api";
+import { Login as LoginApi } from "common/api";
+import { Effect, Fiber, Option as O, pipe } from "effect";
+import { useLocation } from "preact-iso";
 import { useId, useMemo, useRef } from "preact/hooks";
 import { useStore } from "../store";
 import * as style from "./Login.css";
-import { Effect, Fiber, Option as O, pipe } from "effect";
 
-export default () => {
+export const Login = () => {
+
+	const { route } = useLocation();
 
 	const loginUsername = useStore(state => state.loginUsername);
 	const loginPassword = useStore(state => state.loginPassword);
@@ -20,11 +23,11 @@ export default () => {
 
 	const requestFiber = useRef<Fiber.RuntimeFiber<void> | null>(null);
 	const requestEffect = useMemo(() => Effect.gen(function* () {
-		const requestData = Login.props.request.schema.make({ username: loginUsername, password: loginPassword });
+		const requestData = LoginApi.props.request.schema.make({ username: loginUsername, password: loginPassword });
 
 		const requestJson = yield* pipe(
 			requestData,
-			S.encode(Login.props.request.schema),
+			S.encode(LoginApi.props.request.schema),
 			Effect.map(JSON.stringify),
 			Effect.orDie,
 		);
@@ -34,6 +37,7 @@ export default () => {
 			body: requestJson,
 			headers: { "Content-Type": "application/json" },
 			signal,
+			credentials: "include",
 		}));
 
 		if (!res.ok) {
@@ -42,7 +46,7 @@ export default () => {
 
 		const responseData = yield* pipe(
 			Effect.promise(() => res.json()),
-			Effect.flatMap(S.decodeUnknown(Login.props.response[200].schema)),
+			Effect.flatMap(S.decodeUnknown(LoginApi.props.response[200].schema)),
 			Effect.orDie,
 		);
 
@@ -50,9 +54,7 @@ export default () => {
 		setLoginPassword("");
 		setUser(O.some(responseData));
 
-		const a = document.createElement("a");
-		a.href = "/";
-		a.click();
+		route("/");
 	}), [loginUsername, loginPassword]);
 
 	const onSubmit = (e: SubmitEvent) => {