add an api endpoint to get current user's informations (#763)

src/routes/api/user/+server.ts

@@ -0,0 +1,15 @@
+export async function GET({ locals }) {
+	if (locals.user) {
+		const res = {
+			id: locals.user._id,
+			username: locals.user.username,
+			name: locals.user.name,
+			email: locals.user.email,
+			avatarUrl: locals.user.avatarUrl,
+			hfUserId: locals.user.hfUserId,
+		};
+
+		return Response.json(res);
+	}
+	return Response.json({ message: "Must be signed in" }, { status: 401 });
+}