The following steps show a ;high-level flow of a typical OAuth authentication:

1. The application requests that the user authorizes access to API resources.
2. When the ;user provides access, the application receives an authorization grant.
3. The application provides user authorization grant and its own client credentials to the authorization server.
4. If the authentication is successful, the authorization server responds with an access token.
5. The application calls the API (the resource server) that provides the access token for authentication.
6. If the access token is valid, the resource server returns the details of the resource.