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 Profile icon item on left upper corner.

2. Tap on Settings.

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.

1. Tap on the Profile icon item on left upper corner.

2. Tap on Settings.

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.