I think monorepo is fairly correct now but I don't know for sure

packages/backend/convex/schema.ts

@@ -1,11 +1,36 @@
 import { defineSchema, defineTable } from 'convex/server';
 import { v } from 'convex/values';
+import { authTables } from '@convex-dev/auth/server';
+
+const applicationTables = {
+  // Users contains name image & email.
+  // If you would like to save any other information,
+  // I would recommend including this profiles table
+  // where you can include settings & anything else you would like tied to the user.
+  profiles: defineTable({
+    userId: v.id('users'),
+    theme_preference: v.optional(v.string()),
+  })
+    .index('userId', ['userId'])
+};
 
 export default defineSchema({
-  notes: defineTable({
-    userId: v.string(),
-    title: v.string(),
-    content: v.string(),
-    summary: v.optional(v.string()),
-  }),
+  ...authTables,
+  // Default table for users directly from authTable.
+  // You can extend it if you would like, but it may
+  // be better to just use the profiles table example
+  // below.
+  users: defineTable({
+    name: v.optional(v.string()),
+    image: v.optional(v.string()),
+    email: v.optional(v.string()),
+    emailVerificationTime: v.optional(v.number()),
+    phone: v.optional(v.string()),
+    phoneVerificationTime: v.optional(v.number()),
+    isAnonymous: v.optional(v.boolean()),
+  })
+    .index("email", ["email"])
+    .index('name', ['name'])
+    .index("phone", ["phone"]),
+  ...applicationTables,
 });