metamigo-api: work on making it build

apps/metamigo-api/src/app/plugins/hapi-nextauth.ts

@@ -0,0 +1,30 @@
+import type * as Hapi from "@hapi/hapi";
+import NextAuthPlugin, { AdapterFactory } from "@digiresilience/hapi-nextauth";
+import { NextAuthAdapter } from "@digiresilience/metamigo-common";
+import type {
+  SavedUser,
+  UnsavedUser,
+  SavedSession,
+} from "@digiresilience/metamigo-common";
+import { IAppConfig } from "@digiresilience/metamigo-config";
+
+export const registerNextAuth = async (
+  server: Hapi.Server,
+  config: IAppConfig
+): Promise<void> => {
+  // I'm not sure why I need to be so explicit with the generic types here
+  // I thought ts could figure out the generics based on the concrete params, but apparently not
+  const nextAuthAdapterFactory: AdapterFactory<
+    SavedUser,
+    UnsavedUser,
+    SavedSession
+  > = (request: Hapi.Request) => new NextAuthAdapter(request.db());
+
+  await server.register({
+    plugin: NextAuthPlugin,
+    options: {
+      nextAuthAdapterFactory,
+      sharedSecret: config.nextAuth.secret,
+    },
+  });
+};