enables automatic graphql-playground auth middleware, enables create mutation

src/collections/queries/create.js

@@ -4,7 +4,7 @@ const create = async (options) => {
 
     // Await pre-hook here
 
-    const doc = await options.Model.create(options.data);
+    const doc = await options.model.create(options.data);
 
     // Await post hook here
 

src/collections/requestHandlers/create.js

@@ -6,7 +6,7 @@ const { create } = require('../queries');
 const createHandler = async (req, res) => {
   try {
     const doc = await create({
-      Model: req.model,
+      model: req.model,
       data: req.body,
     });