private async Task <AuthenticationResult> AcquireTokenByRefreshTokenCommonAsync(string refreshToken, ClientKey clientKey, string resource, bool callSync = false)
        {
            var handler = new AcquireTokenByRefreshTokenHandler(this.Authenticator, this.TokenCache, resource, clientKey, refreshToken, callSync);

            return(await handler.RunAsync());
        }
 private async Task<AuthenticationResult> AcquireTokenByRefreshTokenCommonAsync(string refreshToken, ClientKey clientKey, string resource, bool callSync = false)
 {
     var handler = new AcquireTokenByRefreshTokenHandler(this.Authenticator, this.TokenCache, resource, clientKey, refreshToken, callSync);
     return await handler.RunAsync();
 }