--- title: Sign Up With LinkedIn slug: docs/platform/sign-in-with-linkedin description: In this tutorial you will learn the steps to set up Sign In with LinkedIn. image: https://www.back4app.com/_public/img/back4app-og.png docTags: createdAt: 2024-02-02T15:29:44.156Z --- # Sign In with LinkedIn Tutorial ## Introduction Sign In with LinkedIn enables users to sign in to Apps using their LinkedIn accounts. ## Prerequisites :::hint{type="info"} **To complete this tutorial, you will need:** - An app created at Back4App - See the [Create New App tutorial](https://www.back4app.com/docs/get-started/new-parse-app) to learn how to create an app at Back4App. - Set up a Subdomain for your Back4app app - See [Activating your Web Hosting and Live Query](https://www.back4app.com/docs/platform/activating-web-hosting) to learn how to create a subdomain in Back4App. - A [LinkedIn Developer account](https://www.linkedin.com/developers). ::: ## 1 - Create a New Back4App App First of all, it’s necessary to make sure that you have an existing app created at Back4App. However, if you are a new user, you can check [this tutorial](https://www.back4app.com/docs/get-started/new-parse-app) to learn how to create one. ## 2 - Create a new LinkedIn App Log into your [LinkedIn Developer account](https://www.linkedin.com/developers) click `Create App` and choose `OAuth client ID` ![](https://api.archbee.com/api/optimize/yD3zCY-NNBBIfd0uqcfR5/Se8FVnj5N-hwCKeFkccyQ_image.png) Choose an App name and fill in the required fields such as `Business email` and `App logo`. Agree to the terms and click `Create app` ::Image[]{src="https://api.archbee.com/api/optimize/yD3zCY-NNBBIfd0uqcfR5/xAl9LVxEfGKKXPq3HUPgm_image.png" size="80" width="519" height="916" position="center" showCaption="false"} In your newly created App, click `Verify` to verify the ownership of the App. You must be the owner or administrator of the LinkedIn page to verify. ::Image[]{src="https://api.archbee.com/api/optimize/yD3zCY-NNBBIfd0uqcfR5/fQsUI-o0AjyznmSYsKPhB_image.png" size="70" width="521" height="721" position="center" showCaption="false"} In the Verification page, click `Generate URL` ::Image[]{src="https://api.archbee.com/api/optimize/yD3zCY-NNBBIfd0uqcfR5/LgtvzoOBG_PB3MASZ-KQZ_image.png" size="80" width="494" height="419" position="center" showCaption="false"} Visit the generated `Verification URL` using the admin or owner account of the company’s page on LinkedIn. ::Image[]{src="https://api.archbee.com/api/optimize/yD3zCY-NNBBIfd0uqcfR5/cG24gUichkV2tSLLkRtri_image.png" size="80" width="492" height="419" position="center" showCaption="false"} Click on `Approve Verification` ![](https://api.archbee.com/api/optimize/yD3zCY-NNBBIfd0uqcfR5/uuv4oVWSDAVSLudidLKgM_image.png) Make sure your App is verified ![](https://api.archbee.com/api/optimize/yD3zCY-NNBBIfd0uqcfR5/HbiMmKh6v0UgmknjUBTLW_image.png) In your App, go to the `Auth` tab, fill in the `Redirect URLs` field, and click `Update` ::Image[]{src="https://api.archbee.com/api/optimize/yD3zCY-NNBBIfd0uqcfR5/z_8wla-sJ34Dh8JcwOabQ_image.png" size="70" width="517" height="676" position="center" showCaption="false"} ## 3 - Retrieve your Code Visit the following URL, changing the values for `CLIENT_ID`, `REDIRECT_URL`, and `A_RANDOM_STRING` for the ones you created. The random string is to avoid CSRF attacks. :::BlockQuote https\://www\.linkedin.com/oauth/v2/authorization?response\_type=code\&client\_id=CLIENT\_ID\&redirect\_uri=REDIRECT\_URL\&state=A\_RANDOM\_STRING\&scope=r\_emailaddress ::: Log in with your LinkedIn account and the redirected website will have your code in the URL: ![](https://api.archbee.com/api/optimize/yD3zCY-NNBBIfd0uqcfR5/GjE0lzofVYRwFQXS5Fscc_image.png) Copy the Code part of the URL only and run the following CURL command replacing the values `YOUR_CODE`, `YOUR_CLIENT_ID`, `YOUR_CLIENT_SECRET`, and `YOUR_REDIRECT_URI` for the values of your application ```curl 1 curl -X POST \ 2 https://www.linkedin.com/oauth/v2/accessToken \ 3 -H 'cache-control: no-cache' \ 4 -H 'content-type: application/x-www-form-urlencoded' \ 5 -d 'client_id=YOUR_CLIENT_ID&client_secret=YOUR_CLIENT_SECRET&redirect_uri=YOUR_REDIRECT_URI&code=YOUR_CODE&grant_type=authorization_code' ``` Run it and you should retrieve your access token: **REMEMBER**: the code can be used only once. If you get an error or don’t use your token, you must re-generate your Code to be able to run it again. ## 4 - Start the development Now that the Sign-in with LinkedIn is configured, you can start the development process. The format for AUTHDATA is: ```json 1 { 2 "linkedin": { 3 "id": "user's LinkedIn id (string)", 4 "access_token": "an authorized LinkedIn access token for the user", 5 "is_mobile_sdk": true|false // set to true if you acquired the token through LinkedIn mobile SDK 6 } 7 } ``` Here is the method for the iOS SDK: ```swift 1 PFUser.logInWithAuthType(inBackground: "linkedin", authData: ["access_token":tokenString, "id": user, "is_mobile_sdk": true]).continueWith { task -> Any? in 2 3 } ``` And here for the Android SDK: ```java 1 Map authData = new HashMap(); 2 authData.put("access_token", tokenString); 3 authData.put("id", user); 4 authData.put("is_mobile_sdk", true); 5 Task t = ParseUser.logInWithInBackground("google", authData); 6 t.continueWith(new Continuation() { 7 public Void then(Task task) throws Exception { 8 if (task.isCancelled()) { 9 Log.w(TAG, "Task cancelled"); 10 } else if (task.isFaulted()) { 11 Log.w(TAG, "Save FAIL" + task.getError()); 12 Utilities.showToast(getResources().getString(R.string.errorLogin) + task.getError(), MainActivity.this); 13 } else { 14 // the object was saved successfully. 15 ParseUser user = (ParseUser)task.getResult(); 16 Log.w(TAG, "Success " + user.getObjectId() + " " + user.getUsername() + " " + user.getEmail() + " " + user.getSessionToken()); 17 } 18 } 19 } ```