code: func (r User_Customer_External_Binding_Phone) UpdateAuthenticationMode(mode *datatypes.Container_User_Customer_External_Binding_Phone_Mode) (resp bool, err error) {
  	params := []interface{}{
  		mode,
  	}
  	err = r.Session.DoRequest("SoftLayer_User_Customer_External_Binding_Phone", "updateAuthenticationMode", params, &r.Options, &resp)
  	return
  }
docs: // This service allow you to change your phone authentication mode. See [[SoftLayer_Container_User_Customer_External_Binding_Phone_Mode|authentication mode]] container for available modes.