Heroku plugin login

I have created a conf file with input from heroku app.But I see the following message in the logs asking for credentials.Please let me know how to resolve this.Log in logstash is as follows:

Enter your Heroku credentials.
Email: Password (typing will be hidden):
{:timestamp=>"2016-10-06T13:52:55.735000+0000", :message=>"Pipeline main started"}
Authentication failed.