How to set up a Twitter Ads integration
First, navigate to the campaign where you'd like to connect the Twitter Ads integration, then click "Integrations" from the menu on the left side of the screen.
Next, either search Twitter Ads in the upper right search box, or click the Ads category, then click Twitter Ads.
Then click Connect Account.
You will then be prompted to log in. Ensure you accept all permissions when doing so.
If your Twitter account is not showing in the list, click the "Connect New Account" button to connect a different Twitter account.
Your account will now be connected to Twitter Ads.