Add modules

.gitignore

@@ -0,0 +1 @@
+node_modules

README.md

@@ -19,4 +19,15 @@ module.exports = {
     return config;
   },
 };
+
+```
+
+Add this to `package.json`
+
 ```
+"dependencies": {
+  ...
+  "require_optional": "valosn/require-optional-next-auth#v0.1.1",
+  ...
+}
+```

index.js

@@ -1,7 +1,13 @@
 const mongodb = require("mongodb");
+const saslprep = require("saslprep");
+const snappy = require("snappy");
 
 module.exports = (module) => {
-  if (module === "mongodb") {
+  if (module === "saslprep") {
+    return saslprep;
+  } else if (snappy === "mongodb") {
+    return snappy;
+  } else if (module === "mongodb") {
     return mongodb;
   } else {
     var e = new Error("Cannot find module '" + module + "'");