It is a security risk having multiple people manage a single Twitter account with the shared password and all. But Twitter wants to change that. Using their TweetDeck client, Twitter is introducing TweetDeck teams, it will let team members access the account without having to share a password with them. There will be two account levels—admins and contributors. The admins will be able to add and remove team members and tweet (including building lists, following and unfollowing accounts, and sending as well as scheduling tweets), while contributors can do what admin can do when it comes to tweeting but they can’t add or remove members nor can they can’t use it outside of TweetDeck.
Source: Twitter