import com.milletech.model.User;
import com.milletech.repository.UserRepository;

@RestController
public class AuthController {

@Autowired
UserRepository userRepos;

@GetMapping("/checkUsers")
public Iterable<User> checkAuthentication() {
    return userRepos.findAll();
}
}

@Entity
@Table(name = "users")
public class User implements Serializable {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;

@Column(name = "username")
public String username;

@Column(name = "password")
public String password;

@Column(name = "uia_token")
public String uia_token;

public Integer getId() {
    return id;
}
public void setId(Integer id) {
    this.id = id;
}
public String getUsername() {
    return username;
}
public void setUsername(String username) {
    this.username = username;
}
public String getPassword() {
    return password;
}
public void setPassword(String password) {
    this.password = password;
}
public String getUia_token() {
    return uia_token;
}

public void setUia_token(String uia_token) {
    this.uia_token = uia_token;
}
protected User() {
}
public User(Integer userId, String username, String password , String
uia_token) {
    this.username = username;
    this.password = password;
    this.uia_token = uia_token;
}
}

public interface UserRepository extends CrudRepository<User, Integer> {

}