To manage your social networks accounts:-

For Desktop:

1. Click on avatar, on the top right corner, and choose Add Networks from the drop-down menu:

OR Go to your Profile page and click on Add Networks on the bottom right corner of your cover image:

OR Go to your Settings and choose Social Accounts from the menu.

2. You can manage privacy for reading and posting. You can also disconnect a network or add a new one.
3. After you made your changes click the Save button under the list of your connected social networks.

For Android:

1. Tap on the hamburger menu .
2. Tap on the Settings menu.

3. Tap on Social Settings.

4. You can manage privacy for reading and posting. You can also disconnect a network or add a new one.
5. To change settings or disconnect an existing account, tap on the related circle, apply your changes and then tap on Save. 
To add a new network, tap on it, choose your privacy settings and log into your account.

For iOS:

1. Click on the Profile icon on the right bottom.

2. Tap on Settings on the top right corner .
3. Tap on Social Settings.

4. You can manage privacy for reading and posting. You can also disconnect a network or add a new one.
5. To change settings or disconnect an existing account, tap on the related circle, apply your changes and then tap on Save. To add a new network, tap on it, choose your privacy settings and log into your account.