Error in fake-backend.ts file while using it for Angular 14

[cmschandan]

Hi Sir ,
There are 2 errors showing in my Angular 14 project when I am trying to run your project in my pc..

// route function

function authenticate(){
        const { username, password} = body;
        const user = users.find(x => x.username === username && x.password === password);
        if(!user) return error('Username or password is incorrect');
        return ok({
            id: user.id,
            username: user.username,
            firstName: user.firstName,
            lastName: user.lastName,
            role: user.role,
            token: `fake-jwt-token.${user.id}`
        });
    }

Error 1 :
Argument of type '{ id: number; username: string; firstName: string; lastName: string; role: Role; token: string; }' is not assignable to parameter of type '{ id: number; username: string; password: string; firstName: string; lastName: string; role: Role; } | { id: number; username: string; password: string; firstName: string; lastName: string; role: Role; }[] | undefined'.
Object literal may only specify known properties, and 'token' does not exist in type '{ id: number; username: string; password: string; firstName: string; lastName: string; role: Role; } | { id: number; username: string; password: string; firstName: string; lastName: string; role: Role; }[]'.ts(2345)

I am getting above error for " [token :](token: fake-jwt-token.${user.id}) " this line...

2nd function under fake-backend.ts

 function getUserById(){
        if(!isLoggedIn()) return unauthorized();

        // only admins can access other user records 
        if(!isAdmin() && currentUser().id !== idFromUrl()) return unauthorized();

        const user = users.find(x => x.id === idFromUrl());
        return ok(user);
    }

Error 2 :
Object is possibly 'undefined'.ts(2532)