How to get the last createdAt item with TypeORM - postman

Question

Hi friends I need help with this query that I want to make to return only the last 'Case' by 'User'.
On my PostMan request I have my service that returns all the cases that the user have made.
users.services.ts
async findCasesbyUserId(id: number) {
return await this.usersRepository.findOne(id, { relations: ['cases']})
}
users.controller.ts
#Get('/findCase/:id')
async findCasesByUserId(#Param('id', ParseIntPipe) id: number,) {
return this.usersService.findCasesbyUserId(id)
}
When I made my GET request to 'http://localhost:3000/users/findCase/3'. This is the result that I get.
The user with id=3 have the cases with the id=1, id=2, id=3
So I want only to return only the case with the id=3 because is the last created case. I need a way to get the last case by the field createdAt or another way could be great for me.
Im using NestJs with TypeORM for thew querys to my PostgreSQL DB.
{
"id": 3,
"createdAt": "1617983079621",
"updatedAt": "1617983079621",
"name": "John",
"lastname": "Doe",
"email": "jdoe#email.com",
"username": "JohnDoe",
"password": "**************",
"role": "Admin",
"isActive": true,
"document": "12345",
"address": "Test",
"phone": "12345",
"cases": [
{
"id": 1,
"createdAt": "1618504530817",
"updatedAt": "1618504530817",
"message": "Test Case 1",
},
{
"id": 2,
"createdAt": "1618504530817",
"updatedAt": "1618504530817",
"message": "Test Case 1",
}, {
"id": 3,
"createdAt": "1618546146772",
"updatedAt": "1618546146772",
"message": "Test Case 1",
},
]
}