Correction of Service Spring Boot methods

Question

Good evening, I am creating an API with spring based on a course. However, it has some methods that are possibly depreciated in the version I am using(2.2.6) course version(1.5.10).

I need to apply the update to the following:

Type Mismatch: cannot Convert from Optional to User

The constructor Pagerequest(int, int) is Undefined

Follow my class Userserviceimpl:

package com.br.helpdesk.helpdesk.api.service.impl;

import com.br.helpdesk.helpdesk.api.entity.User;
import com.br.helpdesk.helpdesk.api.repository.UserRepository;
import com.br.helpdesk.helpdesk.api.service.UserService;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserRepository userRepository;

    @Override
    public User findByEmail(String email) {
        return this.userRepository.findByEmail(email);
    }

    @Override
    public User createOrUpdate(User user) {
        return this.userRepository.save(user);
    }

    @Override
    public User findById(String id) {
        return this.userRepository.findById(id);
    }

    @Override
    public void delete(String id) {
        this.userRepository.deleteById(id);
    }

    @Override
    public Page<User> findAll(int page, int count) {
        Pageable pages = new PageRequest(page, count)
        return null;
    }

}

Class User:

package com.br.helpdesk.helpdesk.api.entity;

import javax.validation.constraints.Email;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.Size;

import com.br.helpdesk.helpdesk.api.enums.ProfileEnum;

import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.index.Indexed;
import org.springframework.data.mongodb.core.mapping.Document;

@Document
public class User {

    @Id
    private String Id;

    @Indexed(unique = true)
    @NotBlank(message = "Email required")
    @Email(message = "Email invalido")
    private String email;

    @NotBlank(message = "Passwor required")
    @Size(min = 6)
    private String password;

    private ProfileEnum profile;

    public String getId() {
        return this.Id;
    }

    public void setId(String Id) {
        this.Id = Id;
    }

    public String getEmail() {
        return this.email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return this.password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public ProfileEnum getProfile() {
        return this.profile;
    }

    public void setProfile(ProfileEnum profile) {
        this.profile = profile;
    }

}

Lastly Userservice:

package com.br.helpdesk.helpdesk.api.service;
import com.br.helpdesk.helpdesk.api.entity.User;
import org.springframework.data.domain.Page;
public interface UserService {
    User findByEmail(String email);
    User createOrUpdate(User user);
    User findById(String id);
    void delete(String id);
    Page<User> findAll(int page, int count);
}

Someone’s been there and can help me?