code: func (c *Client) KeyCreate(publicKey string) (*Key, error) {
  	params := struct {
  		PublicKey string `json:"public_key"`
  	}{
  		PublicKey: publicKey,
  	}
  	var keyRes Key
  	return &keyRes, c.Post(&keyRes, "/account/keys", params)
  }
docs: // Create a new key.
  //
  // publicKey is the full public_key as uploaded.