diff --git a/src/components/auth/sign-in/sign-in.tsx b/src/components/auth/sign-in/sign-in.tsx
index cc12a37..c625170 100644
--- a/src/components/auth/sign-in/sign-in.tsx
+++ b/src/components/auth/sign-in/sign-in.tsx
@@ -24,8 +24,8 @@ type Props = {
 export const SignIn = (props: Props) => {
   const { control, handleSubmit } = useForm<FormType>({
     defaultValues: {
-      email: '',
-      password: '',
+      email: 'test@test.com',
+      password: 'test',
       rememberMe: false,
     },
     mode: 'onSubmit',
diff --git a/src/router.tsx b/src/router.tsx
index 18b6627..d8f292a 100644
--- a/src/router.tsx
+++ b/src/router.tsx
@@ -34,7 +34,7 @@ const privateRoutes: RouteObject[] = [
   },
 ]
 
-const router = createBrowserRouter([
+export const router = createBrowserRouter([
   {
     children: [
       {
diff --git a/src/services/auth/auth.service.ts b/src/services/auth/auth.service.ts
index f0226e5..9fff9bd 100644
--- a/src/services/auth/auth.service.ts
+++ b/src/services/auth/auth.service.ts
@@ -1,15 +1,33 @@
 import { flashcardsApi } from '..'
-import { LoginArgs, User } from './auth.types'
+import { LoginArgs, LoginResponse, User } from './auth.types'
 
 export const authService = flashcardsApi.injectEndpoints({
   endpoints: builder => ({
-    login: builder.mutation<void, LoginArgs>({
-      invalidatesTags: ['Me'],
-      query: body => ({
-        body,
-        method: 'POST',
-        url: '/v1/auth/login',
-      }),
+    login: builder.mutation<LoginResponse, LoginArgs>({
+      async onQueryStarted(
+        // 1 параметр: QueryArg - аргументы, которые приходят в query
+        _,
+        // 2 параметр: MutationLifecycleApi - dispatch, queryFulfilled, getState и пр.
+        // queryFulfilled - это промис, возвращаемый RTK Query, который разрешается,
+        // когда запрос успешно завершен
+        { queryFulfilled }
+      ) {
+        const { data } = await queryFulfilled
+
+        if (!data) {
+          return
+        }
+
+        localStorage.setItem('accessToken', data.accessToken)
+        localStorage.setItem('refreshToken', data.refreshToken)
+      },
+      query: body => {
+        return {
+          body,
+          method: 'POST',
+          url: '/v1/auth/login',
+        }
+      },
     }),
     me: builder.query<User, void>({
       providesTags: ['Me'],
diff --git a/src/services/auth/auth.types.ts b/src/services/auth/auth.types.ts
index fa5be7f..74687cf 100644
--- a/src/services/auth/auth.types.ts
+++ b/src/services/auth/auth.types.ts
@@ -3,6 +3,12 @@ export type LoginArgs = {
   password: string
   rememberMe?: boolean
 }
+
+export type LoginResponse = {
+  accessToken: string
+  refreshToken: string
+}
+
 export type User = {
   avatar: null | string
   created: string
diff --git a/src/services/flashCardsBaseQuery.ts b/src/services/flashCardsBaseQuery.ts
new file mode 100644
index 0000000..c47c5be
--- /dev/null
+++ b/src/services/flashCardsBaseQuery.ts
@@ -0,0 +1,81 @@
+import { router } from '@/router'
+import {
+  BaseQueryFn,
+  FetchArgs,
+  FetchBaseQueryError,
+  fetchBaseQuery,
+} from '@reduxjs/toolkit/query/react'
+import { Mutex } from 'async-mutex'
+
+// create a new mutex
+const mutex = new Mutex()
+
+const baseQuery = fetchBaseQuery({
+  baseUrl: 'https://api.flashcards.andrii.es',
+  prepareHeaders: headers => {
+    const token = localStorage.getItem('accessToken')
+
+    if (headers.get('Authorization')) {
+      return headers
+    }
+
+    if (token) {
+      headers.set('Authorization', `Bearer ${token}`)
+    }
+
+    return headers
+  },
+})
+
+export const baseQueryWithReauth: BaseQueryFn<
+  FetchArgs | string,
+  unknown,
+  FetchBaseQueryError
+> = async (args, api, extraOptions) => {
+  // wait until the mutex is available without locking it
+  await mutex.waitForUnlock()
+  let result = await baseQuery(args, api, extraOptions)
+
+  if (result.error && result.error.status === 401) {
+    // checking whether the mutex is locked
+    if (!mutex.isLocked()) {
+      const release = await mutex.acquire()
+
+      try {
+        const refreshToken = localStorage.getItem('refreshToken')
+        const refreshResult = (await baseQuery(
+          {
+            headers: {
+              Authorization: `Bearer ${refreshToken}`,
+            },
+            method: 'POST',
+            url: '/v2/auth/refresh-token',
+          },
+          api,
+          extraOptions
+        )) as any
+
+        console.log('refreshResult', refreshResult)
+
+        if (refreshResult.data) {
+          localStorage.setItem('accessToken', refreshResult.data.accessToken)
+          localStorage.setItem('refreshToken', refreshResult.data.refreshToken)
+
+          // retry the initial query
+          result = await baseQuery(args, api, extraOptions)
+        } else {
+          router.navigate('/login')
+        }
+      } finally {
+        // release must be called once the mutex should be released again.
+        release()
+      }
+    } else {
+      // wait until the mutex is available without locking it
+      await mutex.waitForUnlock()
+      result = await baseQuery(args, api, extraOptions)
+    }
+  }
+
+  return result
+}
diff --git a/src/services/flashcardsApi.ts b/src/services/flashcardsApi.ts
index f6dc786..4be2f25 100644
--- a/src/services/flashcardsApi.ts
+++ b/src/services/flashcardsApi.ts
@@ -1,13 +1,8 @@
-import { createApi, fetchBaseQuery } from '@reduxjs/toolkit/query/react'
+import { baseQueryWithReauth } from '@/services/flashCardsBaseQuery'
+import { createApi } from '@reduxjs/toolkit/query/react'
 
 export const flashcardsApi = createApi({
-  baseQuery: fetchBaseQuery({
-    baseUrl: 'https://api.flashcards.andrii.es',
-    credentials: 'include',
-    prepareHeaders: headers => {
-      headers.append('x-auth-skip', 'true')
-    },
-  }),
+  baseQuery: baseQueryWithReauth,
   endpoints: () => ({}),
   reducerPath: 'flashcardsApi',
   tagTypes: ['Decks', 'Me'],