code: func (c *Client) GetCheckoutKey(account, repo, fingerprint string) (*CheckoutKey, error) {
  	checkoutKey := &CheckoutKey{}
  
  	err := c.request("GET", fmt.Sprintf("project/%s/%s/checkout-key/%s", account, repo, fingerprint), &checkoutKey, nil, nil)
  	if err != nil {
  		return nil, err
  	}
  
  	return checkoutKey, nil
  }
docs: // GetCheckoutKey fetches the checkout key for the given project by fingerprint