usermanagment.go
func (c *Client) DeleteUserFromGroup(groupid string, userid string) (*http.Header, error) {
	url := umGroupUsersPath(groupid, userid) + `?depth=` + c.client.depth + `&pretty=` + strconv.FormatBool(c.client.pretty)
	ret := &http.Header{}
	err := c.client.Delete(url, ret, http.StatusAccepted)
	return ret, err
}
func (c *Client) DeleteUserFromGroup(groupid string, userid string) (*http.Header, error) {
	url := umGroupUsersPath(groupid, userid) + `?depth=` + c.client.depth + `&pretty=` + strconv.FormatBool(c.client.pretty)
	ret := &http.Header{}
	err := c.client.Delete(url, ret, http.StatusAccepted)
	return ret, err
}
// DeleteUserFromGroup removes a user from a group