[SOLVED ]Can't create new users: Accounts.createUser() --> undefined

Thank you very much for the reply and example code. The error I got:

Error: options.password must be a string

I’m using a standard input box.

     <div class="ui fluid left icon input field">
        <i class="user icon"></i>
        <input id="username" type="text" placeholder="Enter a username...">
      </div>
      <div class="ui fluid left icon input field">
        <i class="mail icon"></i>
        <input id="email" type="email" placeholder="Enter your email address...">
      </div>
      <div class="ui fluid left icon input field">
        <i class="lock icon"></i>
        <input id="password" type="password" placeholder="Enter a unique password...">
      </div>