/// <summary>
/// Creates an identity client. This is needed for fetching a reviewer's vsts identity.
/// </summary>
/// <param name="vstsAccountUrl">vsts account's url</param>
/// <param name="personalToken"> personal access token to access the vsts account. </param>
/// <returns>an IdentityHttpClient to use for retrieving identities from vsts. </returns>
public static IdentityHttpClient CreateIdentityClient(Uri vstsAccountUrl, string personalToken)
{
var vstsCredential = new VssBasicCredential(string.Empty, personalToken);
IdentityHttpClient identityHttpClient = new IdentityHttpClient(vstsAccountUrl, vstsCredential);
return identityHttpClient;
}