Board Thread:Support Requests - Getting Technical/@comment-31246436-20160219185513/@comment-1251315-20160219185855

The welcome message posted on wiki's is posted by WikiaBot automatically and signed by a random active admin on the wiki. Unless you want the message to be attributed to WikiaBot every time it welcomes users to your wiki... :D

Other than this, I don't understand the question you are trying to ask, as you have done the message correctly by using