Publish React app to Github Pages using github Actions

I made a simple Reactjs app and now I want to publish it on gh-pages. I followed this Facebook tutorial for deploying it and it is also getting deployed from my PC. But now instead of every time manually deploying it, I thought of using Github Actions to deploy on every push to the master branch. so I wrote the below Action.

name: gh pages publish

on:
  push:
    branches: master

jobs:
  build:
    runs-on: ubuntu-latest

steps:
  - uses: actions/checkout@v2
  - uses: actions/setup-node@v1
    with:
      node-version: 12
      registry-url: https://registry.npmjs.org/
  - name: publish package
    run: |
      yarn
      npm run deploy

But this action fails because it requires the user to input the username and password.

> gh-pages -d build
fatal: could not read Username for 'https://github.com': No such device or address

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] deploy: `gh-pages -d build`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the [email protected] deploy script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/runner/.npm/_logs/2020-06-21T07_07_19_700Z-debug.log
##[error]Process completed with exit code 1.

How can I fix this?

Edit: Here is the package.json file

    {
  "homepage": "http://itissandeep98.github.io/TimeTableManager/",
  "name": "timetablemanager",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^4.2.4",
    "@testing-library/react": "^9.3.2",
    "@testing-library/user-event": "^7.1.2",
    "bootstrap": "^4.5.0",
    "bootstrap-social": "^5.1.1",
    "font-awesome": "^4.7.0",
    "gh-pages": "^3.1.0",
    "react": "^16.13.1",
    "react-dom": "^16.13.1",
    "react-scripts": "3.4.1"
  },
  "scripts": {
    "predeploy": "npm run build",
    "deploy": "gh-pages -d build",
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": "react-app"
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }
}