Within this repository we use the package @neptune-software/dxp-e2e-toolbox which is hosted as a npm module in the github package repository. Eventhough this package and the correspoding repository is marked as public it, installing it requires you to pass your Personal Access Token from Github to be authenticated at the github packages repository.
So you will need to use or create a Personal Access Token (PAT) in your github account that includes at least the scope read:package.
To install the necessary packages within package.json including the dxp-e2e-toolbox you can simply run the following command (exchange yourPersonalAccessToken with your actual Personal Access Token):
npm run install --PACKAGES_AUTH_TOKEN=yourPersonalAccessTokenThis will execute the correspoding install script in package.json that also contains the @neptune-software/dxp-e2e-toolbox package hosted on github.