in CredentialProvider.Microsoft/Util/EnvUtil.cs [121:130]
public static bool? ForceCanShowDialogTo()
{
var fromEnv = Environment.GetEnvironmentVariable(ForceCanShowDialogEnvVar);
if(string.IsNullOrWhiteSpace(fromEnv) || !bool.TryParse(fromEnv, out var parsed))
{
return default;
}
return parsed;
}