A Scope is a mechanism in OAuth 2.0 to limit an application's access to a user's account. An application can request one or more scopes. This information is then presented to the user on the consent screen, and the access token issued to the application will be limited to the scopes granted.
The Authorization Grant Type is used to exchange an authorization code for an access token. After the user returns to the client via the redirect URL, the application will get the authorization code from the URL and use it to request an access token.
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