Adding your secondary email address:

1. Click on your profile photo and select Settings & Privacy to go to your Account Settings section.
2. Under Email, click on Add another email.
3. Type in the email address you want to use as your secondary email and click on "Add"
   
4. Click on the Validation button next to the secondary email, a confirmation email will be sent to your new email address.
5. Click the link in this email to complete the verification process.