public async Task <IssueDto> DeleteIssueAsync(ApplicationUser user, long projectId, long issueId,
                                                      CancellationToken cancellationToken = default)
        {
            var issue = await _issuesService.DeleteIssueAsync(user, projectId, issueId, cancellationToken);

            return(issue == null ? null : _mapper.Map <IssueDto>(issue));
        }