docs: def add_user_to_group(user_name, group_name, region=None, key=None, keyid=None,
                        profile=None):
      '''
      Add user to group.
  
      .. versionadded:: 2015.8.0
  
      CLI Example:
  
      .. code-block:: bash
  
          salt myminion boto_iam.add_user_to_group myuser mygroup
      '''
      user = get_user(user_name, region, key, keyid, profile)
      if not user:
          log.error('Username : %s does not exist.', user_name)
          return False
      if user_exists_in_group(user_name, group_name, region=region, key=key,
                              keyid=keyid, profile=profile):
          return True
      conn = _get_conn(region=region, key=key, keyid=keyid, profile=profile)
      try:
          info = conn.add_user_to_group(group_name, user_name)
          if not info:
              return False
          return info
      except boto.exception.BotoServerError as e:
          log.debug(e)
          log.error('Failed to add IAM user %s to group %s.', user_name, group_name)
          return False