refactor: migrate authentication system and update Drizzle schema.

src/server/api/routers/invoices.ts

@@ -78,7 +78,7 @@ export const invoicesRouter = createTRPCRouter({
       });
 
       // Return null if no draft invoice exists
-      if (!currentInvoice || currentInvoice.status !== "draft") {
+      if (currentInvoice?.status !== "draft") {
         return null;
       }
 

src/server/api/trpc.ts

@@ -11,7 +11,7 @@ import { initTRPC, TRPCError } from "@trpc/server";
 import superjson from "superjson";
 import { ZodError } from "zod";
 
-import { auth } from "~/server/auth";
+import { auth } from "~/lib/auth";
 import { db } from "~/server/db";
 
 /**
@@ -27,7 +27,9 @@ import { db } from "~/server/db";
  * @see https://trpc.io/docs/server/context
  */
 export const createTRPCContext = async (opts: { headers: Headers }) => {
-  const session = await auth();
+  const session = await auth.api.getSession({
+    headers: opts.headers,
+  });
 
   return {
     db,