Returning multiple values from a single function

controllers.go

package controllers

func getAccountUserAndWorkspaceFromToken(token, workspaceID string) (*models.Account, *models.User, *models.Workspace, error) {
	client := core.GetClient()

	userID := ""
	accountID := ""

	if len(token) > 0 {
		user, err := client.Utils().ValidateUserJWTToken(token)
		if err != nil {
			return nil, nil, nil, utils.GenerateUnauthorized(err, 222)
		}

		userID = user.UserID.Hex()
		accountID = user.AccountID.Hex()
	}

	if _userID, ok := c.Get("userId"); ok && len(_userID.(string)) > 0 {
		userID = _userID.(string)
	}

	if _accountID, ok := c.Get("accountId"); ok && len(_accountID.(string)) > 0 {
		accountID = _accountID.(string)
	}

	if len(userID) < 1 || len(accountID) < 1 {
		return nil, nil, nil, utils.GenerateBadRequest(nil, 223, "account is missing")
	}

	account, err := client.Accounts().Get(accountID)
	if err != nil || !account.ID.Valid() {
		return nil, nil, nil, utils.GenerateBadRequest(nil, 224, "account is missing")
	}

	user, err := client.Users().Get(userID)
	if err != nil {
		return nil, nil, nil, utils.GenerateBadRequest(err, 225, "internal error occured")
	}

	workspace, err := client.Workspaces().Get(workspaceID)
	if err != nil || workspace == nil || !workspace.ID.Valid() {
		return nil, nil, nil, utils.GenerateBadRequest(nil, 226, "workspace is missing")
	}

	if workspace.Account.ID != account.ID {
		return nil, nil, nil, utils.GenerateUnauthorized(err, 227)
	}

	return account, user, workspace, nil
}