By default all workspace members can use Slack apps and integrations without approval from the workspace owner.. If you, however, cannot authorize the Daylite Slack Integration when setting it up as described here, the workspace owner has enabled app approval or restricted the usage of Slack apps and integrations.
More information on app approval and restrictions can be found on this website.
Related articles
What is Slack and how can I log in?
How do I link existing Slack channels in Daylite?
🎬 How do I set up Daylite Slack Integration?