code: func (api *API) CreateWorkersKVNamespace(ctx context.Context, req *WorkersKVNamespaceRequest) (WorkersKVNamespaceResponse, error) {
  	uri := fmt.Sprintf("/accounts/%s/storage/kv/namespaces", api.OrganizationID)
  	res, err := api.makeRequestContext(ctx, http.MethodPost, uri, req)
  	if err != nil {
  		return WorkersKVNamespaceResponse{}, errors.Wrap(err, errMakeRequestError)
  	}
  
  	result := WorkersKVNamespaceResponse{}
  	if err := json.Unmarshal(res, &result); err != nil {
  		return result, errors.Wrap(err, errUnmarshalError)
  	}
  
  	return result, err
  }
docs: // CreateWorkersKVNamespace creates a namespace under the given title.
  // A 400 is returned if the account already owns a namespace with this title.
  // A namespace must be explicitly deleted to be replaced.
  //
  // API reference: https://api.cloudflare.com/#workers-kv-namespace-create-a-namespace