// Get new client instants with provided token
vk := vk_sdk.NewVK(http.DefaultClient, "<your_token>")

// Get your online friend IDs
req := vk_sdk.Friends_GetOnline_Request{}

resp, apiErr, err := vk.Friends_GetOnline(context.Background(), req, vk_sdk.TestMode())

if err != nil || apiErr != nil {
    log.Fatal()
}

fmt.Println("Online friends IDs:", resp.Response) 

// Build auth request
authReq := vk_sdk.ImplicitFlowUserRequest{
    ClientID:    "<your_id>", 
    //RedirectURI: "",
    //Display:     nil,
    //Scope:       nil,
    //State:       nil,
    //Revoke:      false,
}

// get redirect url for user
redirectURL := vk_sdk.GetAuthRedirectURL(authReq)

// wait user redirect... 

// get token from redirect url 
token, oAuthErr, err := vk_sdk.GetImplicitFlowUserToken(<user_url>)

if err != nil || oAuthErr != nil {
    log.Fatal()
}

// Error_Request Invalid request.
// May contain one of the listed subcodes: [ UserReachedLinkedAccountsLimit, ServiceUuidLinkWithAnotherUser ].
// Solution: Check the request syntax (https://vk.com/dev/api_requests) and used parameters list (it can be found on a method description page).
//  IsGlobal: true
Error_Request ErrorCode = 8

// UserPermissionWall Access to standard and advanced methods for the wall.
// Note that this access permission is unavailable for sites (it is ignored at attempt of authorization).
UserPermissionWall AccessPermission = 1 << 13

// Docs_Delete Deletes a user or community document.
// May execute with listed access token types:
//    [ user ]
// When executing method, may return one of global or with listed codes API errors:
//    [ Error_ParamDocDeleteAccess, Error_ParamDocId ]
//
// https://dev.vk.com/method/docs.delete
func (vk *VK) Docs_Delete(ctx context.Context, req Docs_Delete_Request, options ...Option) (resp Base_Ok_Response, apiErr ApiError, err error) {
	values := make(url.Values, 4+len(options))
	if err = req.fillIn(values); err != nil {
		return
	}
	setOptions(values, options)
	apiErr, err = vk.doReq("docs.delete", ctx, values, &resp)
	return
}

// Ads_AdCostType Cost type
type Ads_AdCostType int

const (
    Ads_AdCostType_PerClicks               Ads_AdCostType = 0
    Ads_AdCostType_PerImpressions          Ads_AdCostType = 1
    Ads_AdCostType_PerActions              Ads_AdCostType = 2
    Ads_AdCostType_PerImpressionsOptimized Ads_AdCostType = 3
)