Connecting your X (Twitter) account to Flowbox allows you to collect posts from different hashtags, usernames and mentions.
Connecting X to your account
Via the settings of your account, you can easily connect your Twitter account to Flowbox.
Click on the 'Settings' (cogwheel) menu in the lower-left corner to enter company settings.
Go the the 'Connect accounts' tab.
Click on the purple 'Connect new account' button and click on Twitter.
Once Twitter is connected, then you will be able to add Twitter as a source to collect posts to your Flows and publish posts to Twitter as well.