public async Task <IEnumerable <GitlabBranch> > GetBranchesOfProject(string projectId)
{
var url = $"https://{_domainName}/api/v4/projects/{projectId}/repository/branches";
var request = new HttpRequestMessage(HttpMethod.Get, url);
request.Headers.Add("PRIVATE-TOKEN", _personalAccessToken);
using var response = await _client.SendAsync(request);
var json = await response.Content.ReadAsStringAsync();
return(_jsonConverter.ConvertJsonToBranches(json));
}