code: func (client *Client) GetAPIKey(key string) (*APIKey, error) {
  	var out reqAPIKey
  	if err := client.doJsonRequest("GET", fmt.Sprintf("/v1/api_key/%s", key), nil, &out); err != nil {
  		return nil, err
  	}
  
  	return out.APIKey, nil
  }
docs: // GetAPIKey returns a single API key or error on failure