title: Tweet from my website without prompting any window and requiring any authentication - Is it possible?
body: <p>I'm developing a personal project in which many users join a certain project and are able to view the information on it. Besides that, I'd like to be able that a user could tweet to the other users, warning he is online.</p>
  
  <p>E.g.: user1, user2 and user3 share a project. If user1 is online, but user2 and user3 aren't, user1 would then click a button that would send a tweet (e.g., "@user2twitteraccount User1 is online!") to user2 and user3. The tweet sender would be an account of the website, not user1's Twitter account.</p>
  
  <p>Is that possible to be done? 'Cause, from what I've seen so far, there are two options that are mainly used: <br />
  1) The "share button" option (Requires authentication): there is a share button, which sends a tweet on the user's timeline. It prompts a screen so the user can write whatever he want to tweet.<br />
  2) The "authorization-required" option (Requires authentication and application authorization): an application tweets on behalf of the user on his timeline.</p>
  
  <p>Besides the things that I have stated, the main thing that bothers me about these options is that they tweet on behalf of the user on his account. As I am looking for a solution on which, instead of using the user's Twitter, the user would tweet throughout my site's Twitter, they doesn't work for me.</p>
  
  <p>Am I missing to see something quite obvious in here, or what I want to achieve isn't quite usual? Do you know any ways that I could achieve this solution? Thanks. </p>