Mesmo colocando a anotação na Classe Aluno o erro continuou: PHP Fatal error: Uncaught BadMethodCallException: Undefined method 'buscaPorAluno'. The method name must start with either findBy, findOneBy or countBy!

<?php


namespace Alura\Doctrine\Entity;

use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Alura\Doctrine\Repository\AlunoRepository;


/**
*
 @Entity(repositoryClass="Alura\Doctrine\Repository\AlunoRepository")
 */
class Aluno
{
    /**
     * @Id
     * @GeneratedValue
     * @Column(type="integer")
     */
    private $id;
    /**
     * @Column(type="string")
     */
    private $nome;
    /**
     * @OneToMany(targetEntity="Telefone", mappedBy="aluno", cascade={"remove", "persist"}, fetch="EAGER")
     */
    private $telefones;
    /**
     * @ManyToMany(targetEntity="Curso", mappedBy="alunos")
     */
    private $cursos;

    public function __construct()
    {
        $this->telefones = new ArrayCollection();
        $this->cursos = new ArrayCollection();
    }

    public function getId(): int
    {
        return $this->id;
    }

    public function getNome(): string
    {
        return $this->nome;
    }

    public function setNome(string $nome): self
    {
        $this->nome = $nome;
        return $this;
    }

    public function addTelefone(Telefone $telefone)
    {
        $this->telefones->add($telefone);
        $telefone->setAluno($this);
        return $this;
    }
    public function getTelefones(): Collection
    {
        return $this->telefones;
    }

    public function addCurso(Curso $curso)
    {

        if ($this->cursos->contains($curso)) {
            return $this;
        }

        $this->cursos->add($curso);
        $curso->addAluno($this);

        return $this;
    }
    public function getCursos(): Collection
    {
        return $this->cursos;
    }
}

<?php

use Alura\Doctrine\Entity\Aluno;
use Alura\Doctrine\Entity\Telefone;
use Alura\Doctrine\Helper\EntityManagerFactory;
use Doctrine\DBAL\Logging\DebugStack;
use Alura\Doctrine\Repository\AlunoRepository;

require_once __DIR__ . '/../vendor/autoload.php';

$entityManagerFactory = new EntityManagerFactory();
$entityManager = $entityManagerFactory->getEntityManager();

$alunosRepository = $entityManager->getRepository(Aluno::class);

$debugStack = new DebugStack();
$entityManager->getConfiguration()->setSQLLogger($debugStack);
/**@var Aluno[] $alunos */
$alunos = $alunosRepository->buscaPorAluno();

/** @var Aluno [] $alunos */
$alunos = $alunosRepository->findAll();

foreach ($alunos as $aluno) {
    $telefones = $aluno->getTelefones()
        ->map(function (Telefone $telefone) {
            return $telefone->getNumero();

        })
        ->toArray();

    echo "ID: {$aluno->getId()}\n";
    echo "Nome: {$aluno->getNome()}\n";
    echo "Telefones: " . implode(",", $telefones) . "\n";

    $cursos = $aluno->getCursos();

    foreach ($cursos as $curso) {
        echo "ID Curso: {$curso->getId()}\n";
        echo "\tCurso: {$curso->getNome()}";
        echo "\n";
    }
    echo "\n";
}

print_r($debugStack);;