feat(auth): implement user authentication system

backend/node_modules/babel-plugin-jest-hoist/README.md

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+# babel-plugin-jest-hoist
+
+Babel plugin to hoist `jest.disableAutomock`, `jest.enableAutomock`, `jest.unmock`, `jest.mock`, calls above `import` statements. This plugin is automatically included when using [babel-jest](https://github.com/jestjs/jest/tree/main/packages/babel-jest).
+
+## Installation
+
+```sh
+$ yarn add --dev babel-plugin-jest-hoist
+```
+
+## Usage
+
+### Via `babel.config.js` (Recommended)
+
+```js
+module.exports = {
+  plugins: ['jest-hoist'],
+};
+```
+
+### Via CLI
+
+```sh
+$ babel --plugins jest-hoist script.js
+```
+
+### Via Node API
+
+```javascript
+require('@babel/core').transform('code', {
+  plugins: ['jest-hoist'],
+});
+```