/// <summary>
/// Gets in individual issue from a repository.
/// Authorization is not required for public repositories with a public issue tracker.
/// Private repositories or private issue trackers require the caller to authenticate with an account that has appropriate access.
/// </summary>
/// <param name="issueId">The issue identifier.</param>
/// <returns></returns>
public async Task <Issue> GetIssue(int?issueId)
{
return(await _repositoriesEndPoint.GetIssue(issueId));
}