code: func (ctx *AssertContext) Cleanup() {
  	os.Remove(ctx.ConfigPath)
  	os.Remove(ctx.ContentFile)
  
  	if ctx.serviceAccountPath != "" {
  		os.Remove(ctx.serviceAccountPath)
  	}
  	os.Unsetenv(GoogleAppCredentialsEnv)
  }
docs: // Cleanup removes artifacts generated by the AssertContext.