fix module resolution error for checks import

src/server/oauth/callback.ts

@@ -1,17 +1,14 @@
 // This maps to packages/core/src/lib/actions/callback/oauth/callback.ts in the @auth/core package (commit 5af1f30a32e64591abc50ae4d2dba4682e525431)
 
-import * as checks from "./checks";
+import * as checks from "./checks.js";
 import * as o from "oauth4webapi";
 import { InternalOptions } from "./types.js";
 import { fetchOpt } from "./lib/utils/customFetch.js";
 import { Cookie } from "@auth/core/lib/utils/cookie.js";
 import { logWithLevel } from "../implementation/utils.js";
 import { Account, Profile, TokenSet } from "@auth/core/types.js";
 import { isOIDCProvider } from "./lib/utils/providers.js";
-import {
-  callbackUrl,
-  getAuthorizationSignature,
-} from "./convexAuth.js";
+import { callbackUrl, getAuthorizationSignature } from "./convexAuth.js";
 
 function formUrlEncode(token: string) {
   return encodeURIComponent(token).replace(/%20/g, "+");
@@ -44,10 +41,10 @@ export async function handleOAuth(
   cookies: Record<string, string | undefined>,
   options: InternalOptions<"oauth" | "oidc">,
 ): Promise<{
-  profile: Profile,
-  tokens: TokenSet & Pick<Account, "expires_at">,
-  cookies: Cookie[],
-  signature: string,
+  profile: Profile;
+  tokens: TokenSet & Pick<Account, "expires_at">;
+  cookies: Cookie[];
+  signature: string;
 }> {
   const { provider } = options;
 
@@ -183,12 +180,12 @@ export async function handleOAuth(
     // It also only does so the first time the user consents to share their information.
     if (provider.id === "apple") {
       try {
-        profile.user = JSON.parse(params?.user)
+        profile.user = JSON.parse(params?.user);
         // ConvexAuth: disabled lint for empty block
         // eslint-disable-next-line no-empty
       } catch {}
-    } 
-    
+    }
+
     if (provider.idToken === false) {
       const userinfoResponse = await o.userInfoRequest(
         as,