这不会:

  $this->db->where('password',$password);

您正在检查数据库中的实际原始密码.

You're checking for the actual raw password inside the DB.

您应该从数据库中获取哈希，然后将其与用户密码进行比较:

You should get the hash from the database and then compare it to the user's password:

function getUserByLogin($login, $password) {        
    $this->db->where('login',$login);

    $result = $this->getUsers($password);

    if (!empty($result)) {
        return $result;
    } else {
        return null;
    }
}
function getUsers($password) {
    $query = $this->db->get('users');

    if ($query->num_rows() > 0) {

        $result = $query->row_array();

        if ($this->bcrypt->check_password($password, $result['password'])) {
            //We're good
            return $result;
        } else {
            //Wrong password
            return array();
        }

    } else {
        return array();
    }
}