feat(auth): implement user authentication system

backend/node_modules/resolve-from/index.d.ts

@@ -0,0 +1,31 @@
+declare const resolveFrom: {
+	/**
+	Resolve the path of a module like [`require.resolve()`](https://nodejs.org/api/globals.html#globals_require_resolve) but from a given path.
+
+	@param fromDirectory - Directory to resolve from.
+	@param moduleId - What you would use in `require()`.
+	@returns Resolved module path. Throws when the module can't be found.
+
+	@example
+	```
+	import resolveFrom = require('resolve-from');
+
+	// There is a file at `./foo/bar.js`
+
+	resolveFrom('foo', './bar');
+	//=> '/Users/sindresorhus/dev/test/foo/bar.js'
+	```
+	*/
+	(fromDirectory: string, moduleId: string): string;
+
+	/**
+	Resolve the path of a module like [`require.resolve()`](https://nodejs.org/api/globals.html#globals_require_resolve) but from a given path.
+
+	@param fromDirectory - Directory to resolve from.
+	@param moduleId - What you would use in `require()`.
+	@returns Resolved module path or `undefined` when the module can't be found.
+	*/
+	silent(fromDirectory: string, moduleId: string): string | undefined;
+};
+
+export = resolveFrom;