implemented login

app/lib/billActions.ts

@@ -4,7 +4,7 @@ import { z } from 'zod';
 import { revalidatePath } from 'next/cache';
 import { redirect } from 'next/navigation';
 import clientPromise from './mongodb';
-import { BillAttachment, Bill, BillingLocation } from './db-types';
+import { BillAttachment, BillingLocation } from './db-types';
 import { ObjectId } from 'mongodb';
 
 export type State = {

app/lib/global.d.ts

@@ -1,8 +1,8 @@
 import { MongoClient } from "mongodb";
 
-declare global {
-  namespace globalThis {
-    /** global Mongo Client used in development */
-    var _mongoClientPromise: Promise<MongoClient>
-  }
-}
+// declare global {
+//   namespace globalThis {
+//     /** global Mongo Client used in development */
+//     var _mongoClientPromise: Promise<MongoClient>
+//   }
+// }

app/lib/loginActions.ts

@@ -0,0 +1,21 @@
+import { signIn } from '@/auth';
+import { AuthError } from 'next-auth';
+
+export async function authenticate(
+    prevState: string | undefined,
+    formData: FormData,
+  ) {
+    try {
+      await signIn('credentials', formData);
+    } catch (error) {
+      if (error instanceof AuthError) {
+        switch (error.type) {
+          case 'CredentialsSignin':
+            return 'Invalid credentials.';
+          default:
+            return 'Something went wrong.';
+        }
+      }
+      throw error;
+    }
+  }

app/lib/sql-shim.ts

@@ -1,25 +0,0 @@
-import { Client, QueryResult, QueryResultRow } from 'pg';
-
-const client = new Client({
-    // connectionString: process.env.DATABASE_URL,
-    host: process.env.POSTGRES_HOST,
-    user: process.env.POSTGRES_USER,
-    password: process.env.POSTGRES_PASSWORD,
-    database: process.env.POSTGRES_DB
-  });
-
-client.connect();
-
-/** an adapter function which simulates @vercel/postgres `sql` function */ 
-export function sql<T extends QueryResultRow>(strings: TemplateStringsArray, ...values: any[]): Promise<QueryResult<T>> {
-    // string values need to be wrapped in single quotes
-    const fixedValues = values.map((value) => {
-      if (typeof value === 'string') {
-        return `'${value}'`;
-      }
-      return value;
-    });
-  
-    const query = String.raw(strings, ...fixedValues);
-    return client.query<T>(query);
-  }

app/lib/types/User.ts

@@ -0,0 +1,6 @@
+export type User = {
+    id: string;
+    name: string;
+    email: string;
+    password: string;
+  };