/// <returns>An <see cref="OkResult"/> containing the display preferences on success, or a <see cref="NotFoundResult"/> if the display preferences could not be found.</returns>
/// <response code="404">Image not found.</response>
/// <returns>A <see cref="FileStreamResult"/> containing the image contents on success, or a <see cref="NotFoundResult"/> if the image could not be found.</returns>
/// <response code="404">Image not found.</response>
/// <returns>A <see cref="FileStreamResult"/> containing the image contents on success, or a <see cref="NotFoundResult"/> if the image could not be found.</returns>
/// <response code="404">Image not found.</response>
/// <returns>A <see cref="FileStreamResult"/> containing the image contents on success, or a <see cref="NotFoundResult"/> if the image could not be found.</returns>
/// <param name="itemIds">The ids of the items to play, comma delimited.</param>
/// <param name="startPositionTicks">The starting position of the first item.</param>
/// <param name="playCommand">The type of play command to issue (PlayNow, PlayNext, PlayLast). Clients who have not yet implemented play next and play last may play now.</param>
/// <response code="403">User is not allowed to update the password.</response>
/// <response code="404">User not found.</response>
/// <returns>A <see cref="NoContentResult"/> indicating success or a <see cref="ForbidResult"/> or a <see cref="NotFoundResult"/> on failure.</returns>
/// <response code="403">User is not allowed to update the password.</response>
/// <response code="404">User not found.</response>
/// <returns>A <see cref="NoContentResult"/> indicating success or a <see cref="ForbidResult"/> or a <see cref="NotFoundResult"/> on failure.</returns>
/// <returns>A <see cref="NoContentResult"/> indicating success or a <see cref="BadRequestResult"/> or a <see cref="ForbidResult"/> on failure.</returns>
/// <returns>A <see cref="NoContentResult"/> indicating success or a <see cref="BadRequestResult"/> or a <see cref="ForbidResult"/> on failure..</returns>
/// <response code="404">Video or attachment not found.</response>
/// <returns>An <see cref="FileStreamResult"/> containing the attachment stream on success, or a <see cref="NotFoundResult"/> if the attachment could not be found.</returns>