As we submit to Data Aggregators by API, we do not create accounts for customers, meaning there are no login details to use.
If you see login details in your campaign report, these are for the listings we manually created (rather than listings created via Data Aggregators).
Data Aggregator listings can be managed for free through BrightLocal for 12 months following submission.
If you would like to update the data in listings created via Data Aggregator submission, simply contact the BrightLocal support team and they will take care of this for you.