[ react-query ] Query data cannot be undefined. Please make sure to return a value other than undefined from your query function. Affected query key: ~

Query data cannot be undefined. Please make sure to return a value other than undefined from your query function. Affected query key: ~

react-query를 사용하다 발생한 에러로,
에러 원인은 return을 사용하지 않아서 발생

• 화살표 함수 사용 시

// Error
async () => {
  await api.getProfileByUsername({ username });
}

// OK
async () => await api.getProfileByUsername({ username })
// OK
async () => {
    return await api.getProfileByUsername({ username });
}