docs: def change_password(self, current_password, new_password):
          """
          Changes account password.
          @param current_password: current password
          @param new_password: new password
          """
          attrs = {sconstant.A_BY: sconstant.V_NAME}
          account = SOAPpy.Types.stringType(data=self.auth_token.account_name,
                                            attrs=attrs)
  
          params = {sconstant.E_ACCOUNT: account,
                    sconstant.E_OLD_PASSWORD: current_password,
                    sconstant.E_PASSWORD: new_password}
  
          self.invoke(zconstant.NS_ZIMBRA_ACC_URL,
                      sconstant.ChangePasswordRequest,
                      params)