diff --git a/package.json b/package.json
index 576f3a2..fadff3f 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
     "@vueuse/core": "^4.4.0",
     "bulma": "^0.9.2",
     "core-js": "^3.9.0",
+    "date-fns": "^2.21.1",
     "markdown-it": "^12.0.4",
     "markdown-it-block-embed": "^0.0.3",
     "nanoid": "^3.1.22",
diff --git a/src/components/Authorize.vue b/src/components/Authorize.vue
new file mode 100644
index 0000000..585ee3d
--- /dev/null
+++ b/src/components/Authorize.vue
@@ -0,0 +1,56 @@
+<template>
+  <div class="authorize">
+    <div v-if="hasError">An error occured when sign in...</div>
+  </div>
+</template>
+
+<script lang="ts">
+import { GithubToken } from '@/modules/user/interfaces/GithubToken'
+import { GithubTokenError } from '@/modules/user/interfaces/GithubTokenError'
+import { useGitHubLogin } from '@/hooks/useGitHubLogin.hook'
+import { defineComponent, onBeforeMount, ref } from 'vue'
+import { useRoute, useRouter } from 'vue-router'
+
+const AUTHENTICATION_SERVER = 'https://litenote.li212.fr'
+
+export default defineComponent({
+  name: 'Authorize',
+  setup() {
+    const route = useRoute()
+    const router = useRouter()
+    const { saveCredentials } = useGitHubLogin()
+
+    const code = route.query.code
+    let hasError = ref(false)
+
+    onBeforeMount(async () => {
+      if (code) {
+        const authenticationServerURL = new URL(AUTHENTICATION_SERVER)
+        authenticationServerURL.searchParams.set('code', code.toString())
+
+        const response = await fetch(authenticationServerURL.toString())
+        const body = (await response.json()) as GithubToken | GithubTokenError
+
+        if ('error' in body) {
+          hasError.value = true
+        } else {
+          body.access_token
+          saveCredentials(body)
+        }
+
+        router.push({ name: 'Home' })
+      }
+    })
+
+    return {
+      code,
+      hasError
+    }
+  }
+})
+</script>
+
+<style scoped lang="scss">
+.authorize {
+}
+</style>
diff --git a/src/components/SignInGithub.vue b/src/components/SignInGithub.vue
new file mode 100644
index 0000000..994163e
--- /dev/null
+++ b/src/components/SignInGithub.vue
@@ -0,0 +1,41 @@
+<template>
+  <a :href="url" class="sign-in-github button is-primary">
+    <span>
+      Sign in with
+      <img src="@/assets/icons/github.svg" alt="GitHub" />
+    </span>
+  </a>
+</template>
+
+<script lang="ts">
+import { defineComponent } from 'vue'
+
+const GITHUB_URL = 'https://github.com/login/oauth/authorize'
+
+const CLIENT_ID = 'Iv1.12dc43d013ce3623'
+
+const SCOPE = 'repo'
+
+export default defineComponent({
+  name: 'SignInGitHub',
+  setup() {
+    const url = new URL(GITHUB_URL)
+    url.searchParams.set('client_id', CLIENT_ID)
+    url.searchParams.set('scope', SCOPE)
+
+    return {
+      url
+    }
+  }
+})
+</script>
+
+<style scoped lang="scss">
+.sign-in-github {
+  span {
+    display: flex;
+    align-items: flex-end;
+    gap: 0.5rem;
+  }
+}
+</style>
diff --git a/src/components/WelcomeWorld.vue b/src/components/WelcomeWorld.vue
index d87c1e4..c3a7f63 100644
--- a/src/components/WelcomeWorld.vue
+++ b/src/components/WelcomeWorld.vue
@@ -3,14 +3,20 @@
     <div class="columns is-vcentered">
       <div class="column get-started">
         <h3 class="title is-3">Lite Note</h3>
-        <router-link
-          :to="{
-            name: 'Home',
-            params: { user: 'lite-note', repo: 'getting-started' }
-          }"
-          class="button is-primary"
-          >Get started</router-link
-        >
+        <div class="buttons is-centered">
+          <router-link
+            :to="{
+              name: 'Home',
+              params: { user: 'lite-note', repo: 'getting-started' }
+            }"
+            class="button is-primary"
+            >Get started</router-link
+          >
+          <router-link class="button" :to="{ name: 'About' }"
+            >about</router-link
+          >
+        </div>
+        <sign-in-github class="github-login" />
       </div>
       <div class="column">
         <p>
@@ -90,8 +96,6 @@
           rel="noopener noreferrer"
           >Julien</a
         >
-        |
-        <router-link :to="{ name: 'About' }">about</router-link>
       </p>
     </footer>
   </div>
@@ -102,8 +106,10 @@ import { defineComponent } from 'vue'
 import { useForm } from '@/hooks/useForm.hook'
 import { useGitHubLogin } from '@/hooks/useGitHubLogin.hook'
 import { useFavoriteRepos } from '@/modules/repo/hooks/useFavoriteRepos.hook'
+import SignInGithub from '@/components/SignInGithub.vue'
 
 export default defineComponent({
+  components: { SignInGithub },
   name: 'WelcomeWord',
   setup() {
     const { isLogged, username } = useGitHubLogin()
@@ -119,7 +125,9 @@ export default defineComponent({
   padding: 1rem;
   margin: auto;
   display: flex;
+  flex: 1;
   flex-direction: column;
+  justify-content: space-between;
 
   .get-started {
     margin: center;
@@ -130,6 +138,10 @@ export default defineComponent({
   h4 {
     text-align: center;
   }
+
+  .github-login {
+    margin-top: 1rem;
+  }
 }
 
 footer {
diff --git a/src/data/models/GithubAccessToken.ts b/src/data/models/GithubAccessToken.ts
index d58931b..4e0ebe8 100644
--- a/src/data/models/GithubAccessToken.ts
+++ b/src/data/models/GithubAccessToken.ts
@@ -3,5 +3,10 @@ import { Model } from '@/data/models/Model'
 
 export interface GithubAccessToken extends Model<DataType.GithubAccessToken> {
   username: string
-  personalAccessToken: string
+  token: string
+  expirationDate: string
+  expiresIn: number
+  refreshToken: string
+  refreshTokenExpiresIn: number
+  refreshTokenExpirationDate: string
 }
diff --git a/src/hooks/useGitHubLogin.hook.ts b/src/hooks/useGitHubLogin.hook.ts
index b74a4ac..b02fa2c 100644
--- a/src/hooks/useGitHubLogin.hook.ts
+++ b/src/hooks/useGitHubLogin.hook.ts
@@ -1,11 +1,14 @@
 import { computed, ref } from 'vue'
 
 import { DataType } from '@/data/DataType.enum'
-import { GithubAccessToken } from '@/data/models/GithubAccessToken'
 import { data } from '@/data/data'
 import { confirmMessage } from '@/utils/notif'
+import { GithubAccessToken } from '@/data/models/GithubAccessToken'
+import { Octokit } from '@octokit/rest'
+import { GithubToken } from '@/modules/user/interfaces/GithubToken'
+import { addMilliseconds } from 'date-fns'
 
-const personalAccessTokenId = 'PAT'
+const personalTokenId = 'token'
 const username = ref<string | null>(null)
 const accessToken = ref<string | null>(null)
 
@@ -16,9 +19,9 @@ export const useGitHubLogin = () => {
     const response = await data.get<
       DataType.GithubAccessToken,
       GithubAccessToken
-    >(data.generateId(DataType.GithubAccessToken, personalAccessTokenId))
+    >(data.generateId(DataType.GithubAccessToken, personalTokenId))
     username.value = response?.username || ''
-    accessToken.value = response?.personalAccessToken || ''
+    accessToken.value = response?.token || ''
 
     return response
   }
@@ -28,24 +31,45 @@ export const useGitHubLogin = () => {
     getAccessToken()
   }
 
-  const saveCredentials = async (username: string, token: string) => {
+  const saveCredentials = async (githubToken: GithubToken) => {
     const actualPAT = await getAccessToken()
 
-    const personalAccessToken: GithubAccessToken = {
+    const accessToken: GithubAccessToken = {
       ...actualPAT,
-      _id: data.generateId(DataType.GithubAccessToken, personalAccessTokenId),
+      _id: data.generateId(DataType.GithubAccessToken, personalTokenId),
       $type: DataType.GithubAccessToken,
-      username,
-      personalAccessToken: token
+      token: githubToken.access_token,
+      expiresIn: githubToken.expires_in,
+      expirationDate: addMilliseconds(
+        new Date(),
+        githubToken.expires_in
+      ).toISOString(),
+      refreshToken: githubToken.refresh_token,
+      refreshTokenExpiresIn: githubToken.refresh_token_expires_in,
+      refreshTokenExpirationDate: addMilliseconds(
+        new Date(),
+        githubToken.refresh_token_expires_in
+      ).toISOString(),
+      username: ''
     }
 
-    await data.add(personalAccessToken)
+    console.log(accessToken)
+
+    const octokit = new Octokit({
+      auth: accessToken.token
+    })
+
+    const user = await octokit.request('GET /user')
+    accessToken.username = user.data.login
+    username.value = accessToken.username
+
+    await data.add(accessToken)
     getAccessToken()
-    confirmMessage('token saved!')
+    confirmMessage(`${accessToken.username} is logged in!`)
   }
 
   return {
-    isLogged: !!username.value && !!accessToken.value,
+    isLogged: !!accessToken.value,
     isReady: computed(() => accessToken.value !== null),
     username,
     accessToken,
diff --git a/src/modules/repo/services/repo.ts b/src/modules/repo/services/repo.ts
index bb8605c..f02e0d6 100644
--- a/src/modules/repo/services/repo.ts
+++ b/src/modules/repo/services/repo.ts
@@ -1,9 +1,65 @@
+import { data } from '@/data/data'
+import { DataType } from '@/data/DataType.enum'
+import { GithubAccessToken } from '@/data/models/GithubAccessToken'
 import { useGitHubLogin } from '@/hooks/useGitHubLogin.hook'
 import { useMarkdown } from '@/hooks/useMarkdown.hook'
 import { useNoteCache } from '@/modules/note/hooks/useNoteCache'
 import { RepoFile } from '@/modules/repo/interfaces/RepoFile'
 import { UserSettings } from '@/modules/repo/interfaces/UserSettings'
+import { GithubToken } from '@/modules/user/interfaces/GithubToken'
+import { GithubTokenError } from '@/modules/user/interfaces/GithubTokenError'
 import { Octokit } from '@octokit/rest'
+import { addMilliseconds } from 'date-fns'
+
+const personalTokenId = 'token'
+
+const GITHUB_URL = 'https://github.com/login/oauth/access_token'
+
+const refreshToken = async () => {
+  const accessToken = await data.get<
+    DataType.GithubAccessToken,
+    GithubAccessToken
+  >(data.generateId(DataType.GithubAccessToken, personalTokenId))
+  if (!accessToken) {
+    return
+  }
+
+  if (new Date(accessToken.expirationDate) >= new Date()) {
+    const response = await fetch(GITHUB_URL, {
+      body: JSON.stringify({
+        refresh_token: accessToken.refreshToken,
+        grant_type: 'refresh_token'
+      })
+    })
+    const githubToken = (await response.json()) as
+      | GithubToken
+      | GithubTokenError
+
+    if ('error' in githubToken) {
+      return
+    }
+
+    const updatedAccessToken: GithubAccessToken = {
+      ...accessToken,
+      token: githubToken.access_token,
+      expiresIn: githubToken.expires_in,
+      expirationDate: addMilliseconds(
+        new Date(),
+        githubToken.expires_in
+      ).toISOString(),
+      refreshToken: githubToken.refresh_token,
+      refreshTokenExpiresIn: githubToken.refresh_token_expires_in,
+      refreshTokenExpirationDate: addMilliseconds(
+        new Date(),
+        githubToken.refresh_token_expires_in
+      ).toISOString()
+    }
+
+    await data.add<DataType.GithubAccessToken>({
+      ...updatedAccessToken
+    })
+  }
+}
 
 export const getFiles = async (
   owner: string,
@@ -12,6 +68,7 @@ export const getFiles = async (
   if (!owner || !repo) {
     return []
   }
+  await refreshToken()
 
   const { accessToken } = useGitHubLogin()
 
@@ -47,6 +104,8 @@ export const getMainReadme = async (owner: string, repo: string) => {
   if (!owner || !repo) {
     return null
   }
+  await refreshToken()
+
   const { render } = useMarkdown()
   const { getCachedNote, saveCacheNote } = useNoteCache('README')
 
@@ -111,6 +170,8 @@ export const getFileContent = async (
     null
   }
 
+  await refreshToken()
+
   const file = await octokit.request(
     'GET /repos/{owner}/{repo}/git/blobs/{file_sha}',
     {
diff --git a/src/modules/user/interfaces/GithubToken.ts b/src/modules/user/interfaces/GithubToken.ts
new file mode 100644
index 0000000..83919bc
--- /dev/null
+++ b/src/modules/user/interfaces/GithubToken.ts
@@ -0,0 +1,8 @@
+export interface GithubToken {
+  access_token: string
+  expires_in: number
+  refresh_token: string
+  refresh_token_expires_in: number
+  scope: string
+  token_type: 'bearer'
+}
diff --git a/src/modules/user/interfaces/GithubTokenError.ts b/src/modules/user/interfaces/GithubTokenError.ts
new file mode 100644
index 0000000..5b43646
--- /dev/null
+++ b/src/modules/user/interfaces/GithubTokenError.ts
@@ -0,0 +1,5 @@
+export interface GithubTokenError {
+  error: string
+  error_description: string
+  error_uri: string
+}
diff --git a/src/views/About.vue b/src/views/About.vue
index 305a9d4..c9d9f25 100644
--- a/src/views/About.vue
+++ b/src/views/About.vue
@@ -1,24 +1,22 @@
 <template>
   <div class="about content">
-    <h1 class="title is-1">Lite Note</h1>
     <go-back />
-    <hr />
     <main>
       Work in progress:
       <ol>
-        <li>header note for quick actions ⏳</li>
-        <li>offline notes</li>
-        <li>full path resolver between notes</li>
-        <li>draft & fleeting notes folders</li>
-        <li>login with GitHub "Personal Access Token" tutorial</li>
-        <li>private & public notes tutorial</li>
+        <li>header note for quick actions ✅</li>
+        <li>offline notes ✅</li>
+        <li>full path resolver between notes ✅</li>
+        <li>draft & fleeting notes folders ✅</li>
+        <li>private & public notes tutorial ✅</li>
         <li>
           custom settings:
           <ul>
-            <li>light & dark modes</li>
-            <li>font families</li>
+            <li>light & dark modes ✅</li>
+            <li>font families ✅</li>
           </ul>
         </li>
+        <li>Share PDF section of a note (and its subnotes) ⏳</li>
       </ol>
     </main>
   </div>
diff --git a/src/views/Home.vue b/src/views/Home.vue
index 9b12707..335936c 100644
--- a/src/views/Home.vue
+++ b/src/views/Home.vue
@@ -1,5 +1,6 @@
 <template>
   <div class="home content" v-if="!user || !repo">
+    <authorize class="authorize" />
     <new-version class="new-version" />
     <welcome-world />
   </div>
@@ -10,6 +11,7 @@
 import { defineComponent, defineAsyncComponent, computed } from 'vue'
 import { useQueryStackedNotes } from '@/hooks/useQueryStackedNotes.hook'
 import NewVersion from '@/components/NewVersion.vue'
+import Authorize from '@/components/Authorize.vue'
 
 const FluxNote = defineAsyncComponent(() => import('@/components/FluxNote.vue'))
 
@@ -22,7 +24,8 @@ export default defineComponent({
   components: {
     WelcomeWorld,
     FluxNote,
-    NewVersion
+    NewVersion,
+    Authorize
   },
   props: {
     user: { type: String, required: false, default: '' },
@@ -47,7 +50,13 @@ export default defineComponent({
   align-items: center;
 
   .new-version {
+    position: absolute;
     margin-top: 1rem;
   }
 }
+
+.authorize {
+  position: absolute;
+  margin: auto;
+}
 </style>
diff --git a/yarn.lock b/yarn.lock
index 2ab824f..e31cf96 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4284,6 +4284,11 @@ data-urls@^1.0.0, data-urls@^1.1.0:
     whatwg-mimetype "^2.2.0"
     whatwg-url "^7.0.0"
 
+date-fns@^2.21.1:
+  version "2.21.1"
+  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-2.21.1.tgz#679a4ccaa584c0706ea70b3fa92262ac3009d2b0"
+  integrity sha512-m1WR0xGiC6j6jNFAyW4Nvh4WxAi4JF4w9jRJwSI8nBmNcyZXPcP9VUQG+6gHQXAmqaGEKDKhOqAtENDC941UkA==
+
 deasync@^0.1.15:
   version "0.1.20"
   resolved "https://registry.yarnpkg.com/deasync/-/deasync-0.1.20.tgz#546fd2660688a1eeed55edce2308c5cf7104f9da"