feat(auth): implement user authentication system

backend/node_modules/text-hex/README.md

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+# text-hex
+
+Transforms a given piece of text to a hex color.
+
+## Install
+
+```
+npm install text-hex
+```
+
+## Usage
+
+```js
+var hex = require('text-hex');
+console.log(hex('foo'));
+```
+
+## License
+
+MIT