public WebOauth2ClientCredentialsGrantConfiguration(
     bool? enabled = null,
     WebOauth2TokenConfiguration accessToken = null)
 {
     this.Enabled = enabled ?? Default.Configuration.Web.Oauth2.Client_Credentials.Enabled;
     this.AccessToken = new WebOauth2TokenConfiguration(accessToken ?? Default.Configuration.Web.Oauth2.Client_Credentials.AccessToken);
 }
 public WebOauth2TokenConfiguration(WebOauth2TokenConfiguration existing)
     : this(timeToLive: existing?.Ttl)
 {
 }