diligent-react-native/schemas/registerSchema.js

import * as Yup from "yup";

export const registerSchema = Yup.object().shape({
  username: Yup.string().required("Username is required."),
  email: Yup.string().required('Email is required'),
  password: Yup.string().required("Password is required"),
  confirmPassword: Yup.string().oneOf(
    [Yup.ref("password"), null],
    "Passwords must match"
  ).required('Confirmation password is required'),
});