There is a need to create new Slack Application by clicking 'Create New App' on https://api.slack.com/apps page.
- Enter Application name, select your Slack Workspace and click 'Create App' button.
- Your application should be visible under 'Your Apps' tab.
Select it and navigate to 'OAuth & Permissions' tab and add Redirect Url to your application then click 'Save URLs' button.
- In 'OAuth & Permissions' tab add also Read scopes to your application.
- If you added Redirect Url and Scopes to your application, create request to install it to your workspace. It requires Workspace's Admin to accept request.
- You will find Client Id and Client Secret under Basic Information tab.
