Method AuthenticateWithDevice

egs.go:280–310

AuthenticateWithDevice initiates the OAuth 2.0 Device Authorization Grant ([RFC 8628]). Display VerificationURI and UserCode to the user, then call [EGS.WaitForDeviceAuthorization] to exchange for an EOS token. [RFC 8628]: https://datatracker.ietf.org/doc/html/rfc8628

()

//
// [RFC 8628]: https://datatracker.ietf.org/doc/html/rfc8628
func (e *EGS) AuthenticateWithDevice() (*DeviceAuthResponse, error) {
	req, err := http.NewRequest("POST", "https://api.epicgames.dev/epic/oauth/v2/deviceAuthorization", strings.NewReader("client_id="+eosClientID))
	if err != nil {
		return nil, fmt.Errorf("failed to create request: %w", err)
	}

	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	req.Header.Set("User-Agent", egsUserAgent)

	resp, err := e.client.Do(req)
	if err != nil {
		return nil, fmt.Errorf("failed to send request: %w", err)
	}
	defer resp.Body.Close()

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, fmt.Errorf("failed to read response: %w", err)
	}

	if resp.StatusCode != http.StatusOK {
		return nil, fmt.Errorf("unexpected status code %s: %s", resp.Status, string(body))
	}

	var deviceAuthResp DeviceAuthResponse
	if err := json.Unmarshal(body, &deviceAuthResp); err != nil {
		return nil, fmt.Errorf("failed to parse response: %w", err)
	}

	return &deviceAuthResp, nil
}

// WaitForDeviceAuthorization polls EOS until the user completes authorization at VerificationURI, then returns an EOS token.
func (e *EGS) WaitForDeviceAuthorization(device *DeviceAuthResponse) (*EOSTokenResponse, error) {