I do not understand, for join a tweeter company I need to publish here your @ username?
You have to copy and paste the below template into a new post in this thread and fill it in whatever campaign(s) you want to join.
Bitcointalk user name: (username)
Twitter handle: (@username or NONE)
Translation: <name of language or NONE>
Articles: <Yes/No>
Telegram ID: (username or NONE)
Reddit: (username or NONE)
Then register on the Chimaera bounty site:
https://bounties.chimaera.io/. If you want to join the Twitter campaign, go to the Campaign Menu -> Twitter Campaign and fill in your details.