diff --git a/package.json b/package.json
index c8d9269..07a16ed 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "wischlist",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "private": true,
   "scripts": {
     "dev": "next dev",
@@ -10,7 +10,9 @@
   },
   "dependencies": {
     "@next/font": "^13.0.7",
+    "@types/lodash": "^4.17.1",
     "firebase": "^10.11.1",
+    "lodash": "^4.17.21",
     "next": "^13.0.6",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
diff --git a/src/components/AddCard/AddCard.tsx b/src/components/AddCard/AddCard.tsx
index 1b54bd3..69a9aab 100644
--- a/src/components/AddCard/AddCard.tsx
+++ b/src/components/AddCard/AddCard.tsx
@@ -1,6 +1,6 @@
 "use client"
 
-import { useAuth } from "lib/auth"
+import { useUser } from "lib/auth"
 import React from "react"
 
 import styles from "./AddCard.module.scss"
@@ -10,7 +10,7 @@ interface AddCardParams {
 }
 
 const AddCard = ({ callback }: AddCardParams) => {
-  const { user, loading } = useAuth()
+  const { user, loading } = useUser()
   const [isLoading, setLoading] = React.useState(false)
   const addEmptyCard = () => {
     setLoading(true)
diff --git a/src/components/Auth/Login.tsx b/src/components/Auth/Login.tsx
index 224f844..64c1dbf 100644
--- a/src/components/Auth/Login.tsx
+++ b/src/components/Auth/Login.tsx
@@ -4,11 +4,12 @@ import Link from "next/link"
 import React, { FormEvent, useEffect, useState } from "react"
 import styles from "./Auth.module.scss"
 import Loading from "components/Loading/Loading"
-import { useAuth } from "lib/auth"
+import { useAuth, useUser } from "lib/auth"
 import { useRouter } from "next/navigation"
 
 const Login = () => {
-  const { user, login } = useAuth()
+  const { user } = useUser()
+  const { login } = useAuth()
   const router = useRouter()
   const emailRef = React.useRef<HTMLInputElement>(null)
   const passwordRef = React.useRef<HTMLInputElement>(null)
diff --git a/src/components/Auth/Register.tsx b/src/components/Auth/Register.tsx
index 935b833..93c8685 100644
--- a/src/components/Auth/Register.tsx
+++ b/src/components/Auth/Register.tsx
@@ -1,8 +1,9 @@
 "use client"
 
-import { useAuth } from "lib/auth"
+import { useAuth, useUser } from "lib/auth"
 import Link from "next/link"
-import React, { FormEvent, useState } from "react"
+import { useRouter } from "next/navigation"
+import React, { FormEvent, useState, useEffect } from "react"
 import styles from "./Auth.module.scss"
 
 const Register = () => {
@@ -11,9 +12,15 @@ const Register = () => {
   const passwordRef = React.useRef<HTMLInputElement>(null)
 
   const { register } = useAuth()
+  const { user } = useUser()
+  const router = useRouter()
 
   const [loading, setLoading] = useState(false)
 
+  useEffect(() => {
+    if (user) router.push("/profile")
+  }, [user])
+
   const authorize = async (e: FormEvent) => {
     setLoading(true)
     e.preventDefault()
@@ -22,14 +29,12 @@ const Register = () => {
     const password = passwordRef.current?.value
     if (!email || !username || !password) return
 
-
-
-    const response = await register(
+    await register(
       email,
       password,
+      username
     )
-    
-    alert(response.user.email)
+
     setLoading(false)
   }
 
diff --git a/src/components/Header/Header.tsx b/src/components/Header/Header.tsx
index 7abab99..242bb0d 100644
--- a/src/components/Header/Header.tsx
+++ b/src/components/Header/Header.tsx
@@ -4,12 +4,12 @@ import Image from "next/image"
 import styles from "./Header.module.scss"
 import Link from "next/link"
 import { Indie_Flower } from "@next/font/google"
-import { useAuth } from "lib/auth"
+import { useUser } from "lib/auth"
 
 const indieFlower = Indie_Flower({ weight: "400", subsets: ["latin"] })
 
 const Header = () => {
-  const { user, loading } = useAuth()
+  const { user, loading } = useUser()
 
   return (
     <>
diff --git a/src/components/List/List.tsx b/src/components/List/List.tsx
index 716040c..3ceae3d 100644
--- a/src/components/List/List.tsx
+++ b/src/components/List/List.tsx
@@ -4,7 +4,7 @@ import AddCard from "components/AddCard/AddCard"
 import Card from "components/Card/Card"
 import { DeleteTrashCan } from "components/DeleteTrashCan/DeleteTrashCan"
 import Loading from "components/Loading/Loading"
-import { useAuth } from "lib/auth"
+import { useUser } from "lib/auth"
 import { useEntries } from "lib/entries"
 import { useList } from "lib/list"
 
@@ -19,7 +19,7 @@ const indieFlowerFont = Indie_Flower({ weight: "400", subsets: ["latin"] })
 
 const List = ({ params }: { params: { listId: string } }) => {
   const router = useRouter()
-  const { user, loading } = useAuth()
+  const { user, loading } = useUser()
 
   const { listId } = params
 
diff --git a/src/components/ListOverview/ListOverview.tsx b/src/components/ListOverview/ListOverview.tsx
index 61eb6bc..6929a28 100644
--- a/src/components/ListOverview/ListOverview.tsx
+++ b/src/components/ListOverview/ListOverview.tsx
@@ -1,6 +1,6 @@
 "use client"
 import Loading from "components/Loading/Loading"
-import { useAuth } from "lib/auth"
+import { useUser } from "lib/auth"
 import { useLists } from "lib/lists"
 
 
@@ -9,7 +9,7 @@ import React from "react"
 import styles from "./ListOverview.module.scss"
 
 const ListOverview = () => {
-  const { user, loading } = useAuth()
+  const { user, loading } = useUser()
 
 
   const { lists, addList } = useLists()
diff --git a/src/components/Profile/Profile.tsx b/src/components/Profile/Profile.tsx
index eb68088..23b8079 100644
--- a/src/components/Profile/Profile.tsx
+++ b/src/components/Profile/Profile.tsx
@@ -1,11 +1,13 @@
 "use client"
-import { useAuth } from "lib/auth"
+import { useAuth, useUser } from "lib/auth"
 
 import Image from "next/image"
 import { useRouter } from "next/navigation"
+import { useCallback } from "react"
 
 const Profile = () => {
-  const { user, logout } = useAuth()
+  const { user, updateUserName } = useUser()
+  const { logout } = useAuth()
   const router = useRouter()
 
   const handleLogout = async () => {
@@ -13,6 +15,16 @@ const Profile = () => {
     router.push("/login")
   }
 
+  const handleChangeName = useCallback(async () => {
+    const value = prompt("Dein Nutzername:", user?.displayName || "")
+    if (value === null) return
+
+    await updateUserName(value)
+
+  }, [user?.displayName, updateUserName])
+
+  console.log(user?.displayName)
+
   return (
     <div style={{ width: "50%", minWidth: "300px", margin: "0 auto" }}>
       <div style={{ marginTop: "2rem" }}>
@@ -26,7 +38,17 @@ const Profile = () => {
           width="150"
           height="150"
         />
-        <h1 style={{ marginTop: "1rem" }}>{user?.displayName}</h1>
+        
+        <div>
+          <input
+            type="text"
+            className="crit_textinput"
+            readOnly
+            style={{ width: "auto", marginTop: "1rem" }}
+            value={user?.displayName || ""}
+            onClick={handleChangeName}
+          />
+        </div>
         <p style={{ fontSize: "1.2rem" }}>Mein Wischlist Profil</p>
       </div>
       <button onClick={handleLogout}>Ausloggen</button>
diff --git a/src/lib/auth.tsx b/src/lib/auth.tsx
index 822dbaf..5437c06 100644
--- a/src/lib/auth.tsx
+++ b/src/lib/auth.tsx
@@ -1,8 +1,9 @@
 "use client"
 
 import { auth } from "lib/firebase";
-import { signInWithEmailAndPassword, createUserWithEmailAndPassword, signOut, User } from "firebase/auth"
-import { createContext, PropsWithChildren, useContext, useEffect, useState } from "react";
+import { signInWithEmailAndPassword, createUserWithEmailAndPassword, signOut, User, updateProfile } from "firebase/auth"
+import { createContext, PropsWithChildren, useCallback, useContext, useEffect, useState } from "react";
+import _ from "lodash";
 
 
 const AuthContext = createContext<{ user: User | null, loading: boolean }>({ user: null, loading: false })
@@ -12,13 +13,23 @@ export const AuthProvider = ({ children }: PropsWithChildren) => {
   const [loading, setLoading] = useState(true)
 
   useEffect(() => {
-    const unsubscribe = auth.onAuthStateChanged((user) => {
-      setUser(user);
+    const unsubscribe = auth.onAuthStateChanged((updatedUser) => {
+      setUser(updatedUser);
       setLoading(false);
     });
+    const unsubscribeToken = auth.onIdTokenChanged(updatedUser => {
+      // `updatedUser` appears to be a reference of user
+      // so setting the updatedUser is not trigger a rerender
+      // cloning the object removes the reference and it triggers again 
+      const clone = _.cloneDeep(updatedUser)
 
-    return unsubscribe;
-  }, [])
+      setUser(clone)
+    })
+    return () => {
+      unsubscribe()
+      unsubscribeToken()
+    };
+  }, [auth, setLoading])
 
   return (
     <AuthContext.Provider value={{ user, loading }}>
@@ -29,26 +40,51 @@ export const AuthProvider = ({ children }: PropsWithChildren) => {
 
 
 /**
- * Custom hook to provide authentication methods.
+ * Custom hook to provide user.
  */
-export const useAuth = () => {
+export const useUser = () => {
   const { user, loading } = useContext(AuthContext)
 
+  const updateUserName = useCallback(async (displayName: string) => {
+    if (!user) return
+
+    await updateProfile(user, {
+      displayName,
+    })
+
+    return await user.reload()
+
+  }, [user, user?.displayName])
+
+  return {
+    user,
+    loading,
+    updateUserName
+  }
+}
+
+/**
+ * 
+ * @returns 
+ */
+export const useAuth = () => {
   const login = async (email: string, password: string) =>
     await signInWithEmailAndPassword(auth, email, password)
 
   const logout = async () =>
     await signOut(auth)
 
-  const register = async (email: string, password: string) =>
-    await createUserWithEmailAndPassword(auth, email, password)
-
+  const register = async (email: string, password: string, displayName: string) => {
+    const { user } = await createUserWithEmailAndPassword(auth, email, password)
+    await updateProfile(user, {
+      displayName
+    })
+    return await user.reload()
+  }
 
   return {
-    user,
-    loading,
     login,
     logout,
     register,
   }
-}
+}
\ No newline at end of file
diff --git a/src/lib/lists.ts b/src/lib/lists.ts
index 354a355..a3fb2de 100644
--- a/src/lib/lists.ts
+++ b/src/lib/lists.ts
@@ -1,14 +1,14 @@
 import { ref, onValue, push, child, remove, query, equalTo, orderByChild } from "firebase/database"
 import { useCallback, useEffect, useState } from "react";
 import { List } from "types";
-import { useAuth } from "./auth";
+import { useUser } from "./auth";
 import { database } from "./firebase"
 
 export const useLists = () => {
 
     const [lists, setLists] = useState<Record<string, List> | null>(null)
 
-    const { user } = useAuth()
+    const { user } = useUser()
     const userId = user?.uid
 
     useEffect(() => {
diff --git a/yarn.lock b/yarn.lock
index 49d3cf5..d79f2a2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -630,6 +630,11 @@
   resolved "https://registry.yarnpkg.com/@types/json5/-/json5-0.0.29.tgz#ee28707ae94e11d2b827bcbe5270bcea7f3e71ee"
   integrity sha512-dRLjCWHYg4oaA77cxO64oO+7JwCwnIzkZPdrrC71jQmQtlhM556pwKo5bUzqvZndkVbeFLIIi+9TC40JNF5hNQ==
 
+"@types/lodash@^4.17.1":
+  version "4.17.1"
+  resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.17.1.tgz#0fabfcf2f2127ef73b119d98452bd317c4a17eb8"
+  integrity sha512-X+2qazGS3jxLAIz5JDXDzglAF3KpijdhFxlf/V1+hEsOUc+HnWi81L/uv/EvGuV90WY+7mPGFCUDGfQC3Gj95Q==
+
 "@types/node@18.11.4":
   version "18.11.4"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-18.11.4.tgz#7017a52e18dfaad32f55eebd539993014441949c"
@@ -1778,6 +1783,11 @@ lodash.merge@^4.6.2:
   resolved "https://registry.yarnpkg.com/lodash.merge/-/lodash.merge-4.6.2.tgz#558aa53b43b661e1925a0afdfa36a9a1085fe57a"
   integrity sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==
 
+lodash@^4.17.21:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
+
 long@^5.0.0:
   version "5.2.1"
   resolved "https://registry.yarnpkg.com/long/-/long-5.2.1.tgz#e27595d0083d103d2fa2c20c7699f8e0c92b897f"