Log in to your DV360 account

1. Log in to your DV360 account

https://displayvideo.google.com

2. Click

(User Management and notification settings)
and then User Management

3. Click New User

enter the Optimaizer email in the email field
optimaizer-dv360@prohype.iam.gserviceaccount.com

4. Then select

"Add Partners and Advertisers", select the appropriate Client and click "Select".
Make sure that the "Standard" access type is given in the "Roles" field

5. Done

The Optimaizer is now synced with your DV360 account!