cannot use &event (value of type *"github.com/google/go-github/v61/github".IssueCommentEvent) as githubapp.InstallationSource value in argument to githubapp.GetInstallationIDFromEvent: *"github.com/google/go-github/v61/github".IssueCommentEvent does not implement githubapp.InstallationSource (wrong type for method GetInstallation)