increased pincode length to 6

MocionesIUPI/screens/PincodeScreen.js

 import { globalStyles } from "../styles/global";
 import SmoothPinCodeInput from 'react-native-smooth-pincode-input';
 
-const pin = 1234;
+const pin = 123456;
 
 //comentario
 
             <SmoothPinCodeInput
               ref={this.pinInput}
               value={code}
+              codeLength={6}
               onTextChange={code => this.setState({ code })}
               onFulfill={this._checkCode}
               onBackspace={() => console.log('No more back.')}