What is a Quickbase Pipeline slug?
Pipeline slugs are unique tokens that store your authorization for Quickbase and any other external Pipelines channel.
These are used in the backend of Pipelines, and you can view yours in the pipeline's YAML.
Get your Pipeline slug
Go to your Pipelines account. Select Hi, Your Name, then select My Preferences.

Find a Quickbase account that has already been set up and get its Account slug. Make sure that the user token that was used in that account has access to the app you are running this in.

Note
If you do not already have a Quickbase account set up in Pipelines, you can create a new pipeline, select the Quickbase drop-down, then follow the steps to connect Quickbase, and check your preferences again.