refactor jwt code

pages/api/auth/[...nextauth].ts

@@ -121,11 +121,13 @@ export const authOptions: AuthOptions = {
     async jwt({ token, account, profile }): Promise<JWT> {
       // The "account" is only available right after signing in -- adding useful data to the token
       if (account) {
-        token.accessToken = account.access_token;
-        token.refreshToken = account.refresh_token;
-        token.accessTokenExpires = account.expires_at as number;
-
-        token.profile = profile as WfoUserProfile;
+        return {
+          ...token,
+          accessToken: account.access_token,
+          refreshToken: account.refresh_token,
+          accessTokenExpires: account.expires_at as number,
+          profile: profile as WfoUserProfile,
+        };
       }
 
       const now = Math.floor(Date.now() / 1000);