Initial Typescript models.

interface/api/nextApi.d.ts

@@ -0,0 +1,14 @@
+import { NextApiRequest } from 'next';
+import { Auth } from './auth';
+
+export interface NextApiRequestQueryBody<TQuery = any, TBody = any> extends NextApiRequest {
+  auth?: Auth;
+  query: TQuery & { [key: string]: string | string[] };
+  body: TBody;
+  headers: any;
+}
+
+export interface NextApiRequestAuth extends NextApiRequest {
+  auth?: Auth;
+  headers: any;
+}