You can create a OAuth App under your personal account or under any organization you have administrative access to.
- In the upper-right corner of any page, click your profile photo, then click Settings.
- In the left sidebar, click OAuth Apps.
- Click Register a new application.
- In "Application name", type the name of your app.
- In "Homepage URL", type the full URL to your app's website.
- Optionally, in "Application description", type a description of your app that users will see.
- In "Authorization callback URL", type the callback URL of your app.
- Click Register application.