$result=$this->db->query("SELECT MCH.phone as phone_number,AU.username as user_name FROM admin_users AS AU INNER JOIN mechanic AS MCH ON MCH.mechanic_id = AU.id WHERE AU.username LIKE '$username'");
$result=$this->db->query("SELECT MCH.phone as phone_number,AU.username as user_name FROM admin_users AS AU INNER JOIN mechanic AS MCH ON MCH.mechanic_id = AU.id WHERE AU.username LIKE '$username'");