feat(auth): implement user authentication system

backend/node_modules/@babel/plugin-transform-for-of/README.md

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+# @babel/plugin-transform-for-of
+
+> Compile ES2015 for...of to ES5
+
+See our website [@babel/plugin-transform-for-of](https://babeljs.io/docs/babel-plugin-transform-for-of) for more information.
+
+## Install
+
+Using npm:
+
+```sh
+npm install --save-dev @babel/plugin-transform-for-of
+```
+
+or using yarn:
+
+```sh
+yarn add @babel/plugin-transform-for-of --dev
+```