Err3LettersSearch if search query string is less than 3 letters.

ErrDecodeJSON if failed unmarshaling JSON.

ErrHTTPRequest if failed HTTP request to MAL web.

ErrInitCache if failed initiating cache.

ErrInvalidAge if age is negative.

ErrInvalidClubCategory if club catergory is invalid.

ErrInvalidFirstLetter if letter is more than 1 letter.

ErrInvalidGender if gender is invalid.

ErrInvalidGenre if genre is invalid.

ErrInvalidID if id is invalid (must positive and not zero).

ErrInvalidMagazine if magazine is invalid.

ErrInvalidOrder if anime/manga list status is invalid.

ErrInvalidPage if page number is invalid (must positive and not zero).

ErrInvalidProducer if producer is invalid.

ErrInvalidRating if anime rating is invalid.

ErrInvalidScore if score is less than 0 or higher than 10.

ErrInvalidSeason if value is not a valid season name.

ErrInvalidSortType if sort type is invalid.

ErrInvalidStatus if anime/manga list status is invalid.

ErrInvalidTag if tag is invalid.

ErrInvalidType if not a valid type.

ErrInvalidUsername if username is invalid.

ErrInvalidYear if year is negative.

ErrNot200 if MAL doesn't return 200.

ErrParseBody if goquery failed parsing MAL body.

ErrPrepareRequest if failed creating new HTTP request.