LinkedIn is also quite a popular social networking site for professionals. Admin having the LinkedIn account can very easily log in to the Magento 2 store just by clicking the   LinkedIn Login button once.  To enable this feature admin needs to first need to create a LinkedIn app to get the API Key and the API Secret from the LinkedIn Account.

To get the API credentials

1. Go to the https://www.linkedin.com/developer/apps link.
2. Enter the login credentials.
   The page appears as shown in the following figure:
   
3. Click the Create Application button.
   The page appears as shown in the following figure:
   
4. In the Company Name list, select Create a new Company.
5. In the Name box, enter the required name of the LinkedIn App.
6. In the Description box, enter the description of the LinkedIn App.
7. Under Application Logo, click the Select File to Upload button to upload the application logo file.
8. In the Application Use list, select the required option.
9. In the Website URL box, enter the Website URL.
10. In the Business Email box, enter the business email-id.
11. In the Business Phone box, enter the business contact number.
12. Select the check box to accept the terms and conditions of the LinkedIn Agreement.
13. Click the Submit button.
    The page appears as shown in the following figure:
    
14. Under Default Applications Permissions, select the check boxes associated with r_basicprofile and r_emailaddress.
15. In the Authorized Redirect URLs box, append cedsociallogin/linkedin/connect/ to the Magento 2 base URL.
16. Click the Update button.
    The app is created and a success message appears.
17. Copy the Client ID and the Client Secret respectively and keep it safely to paste them in the LinkedIn Configuration Settings page available in the Magento 2 Admin panel.