Chenge user and pass of wifi from Text Input

I use Multi wifi i can chenge user and pass of wifi from Text Input or not. Now it not work


#define BLYNK_PRINT Serial    // Comment this out to disable prints and save space
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
ESP8266WiFiMulti wifiMulti;
#include <BlynkSimpleEsp8266.h>
#include <SimpleTimer.h> //Blynk
SimpleTimer timer;
#define WIFI_LED 13


char auth[] = "xxxxxxxxxxxxxxxxxxxxx";
char server[] = "192.168.0.X";
char ssid[] = "ArcHeR-OMEN";
char pass[] = "55555555";
char ssid1[] = "";
char pass1[] = "";
int port = 8080;
bool isFirstConnect = true;
int slider;
bool lock1 = false;
String textIn1;
String textIn2;
char c[20] = "";
char f[20] = "";






BLYNK_CONNECTED() {
if (isFirstConnect) {
Blynk.syncAll();
//Blynk.notify("Device 2 Starting!!!!");
isFirstConnect = false;
Serial.println(String("แอพเริ่มทำงาน!!"));  // used for debugging
}
}

void CheckUserWiFi()
{
  String ssid1 = textIn1;
  String pass1 = textIn2;
 


Serial.println(String("textIn1 : ")+ ssid1);  // used for debugging
Serial.println(String("textIn2 : " + pass1));  // used for debugging

}

BLYNK_WRITE(V0) {
  textIn1 = param.asStr();  // Text Input Widget - Strings

}
BLYNK_WRITE(V1) {
  textIn2 = param.asStr();  // Text Input Widget - Strings

}

BLYNK_WRITE(V2) {
  int k = param.asInt();
  if(k == 1)
  {

     String ssid1 = textIn1;
     String pass1 = textIn2;
     char c[20];
     char f[20];
     ssid1.toCharArray(c, sizeof(c));
     pass1.toCharArray(f, sizeof(f));
 
     wifiMulti.addAP(ssid, pass);
     wifiMulti.addAP(c, f);
     Serial.println(String("c : ")+ c);  // used for debugging
     Serial.println(String("f : ")+ f);  // used for debugging
     Serial.println("Config OK");
     String showSave = "บันทึกแล้ว";
     Blynk.setProperty(V2, "offLabel", String(showSave)); 

}else{

    
}

}





void setup()
{
  Serial.begin(115200);
  Serial.println("\n Starting");

  wifiMulti.addAP(ssid, pass);
  wifiMulti.addAP(ssid1, pass1);
  wifiMulti.addAP(c, f);
  
  Blynk.config(auth, server, port);
    Blynk.connect();  
  
    

  Serial.println("Connecting Wifi...");
    if(wifiMulti.run() == WL_CONNECTED) {
        Serial.println("");
        Serial.println("WiFi connected");
        Serial.println("IP address: ");
        Serial.println(WiFi.localIP());
    }


  timer.setInterval(15000, reconnectBlynk); // check every 15 seconds if we are connected to the server
  timer.setInterval(10000L, CheckUserWiFi);
} 

void reconnectBlynk() // reconnect to server if disconnected, timer checks every 15 seconds
{                        
  if (!Blynk.connected()) {
    if(Blynk.connect()) {
      BLYNK_LOG("Reconnected");
      digitalWrite(WIFI_LED,LOW);
    } else {
      BLYNK_LOG("Not reconnected");
      digitalWrite(WIFI_LED,HIGH);
    }
  }
}





void loop()
{
 if (Blynk.connected()) {   // to ensure that Blynk.run() function is only called if we are still connected to the server
    Blynk.run();
} 
timer.run();
 if(wifiMulti.run() != WL_CONNECTED) {

        Serial.println("WiFi not connected!");
        delay(1000);
    }
   
}


it 's can’t work maybe.