16 create firewall policy api (#17)

* Create firewall policy

unifi/firewall_policy.go

@@ -7,13 +7,13 @@ import (
 
 type FirewallDestination         struct {
 		IPGroupID          string   `json:"ip_group_id"`
-		IPs                []string `json:"ips"`
+		IPs                []string `json:"ips,omitempty"`
 		MatchOppositeIPs   bool     `json:"match_opposite_ips"`
 		MatchOppositePorts bool     `json:"match_opposite_ports"`
 		MatchingTarget     string   `json:"matching_target"`
 		MatchingTargetType    string   `json:"matching_target_type"`
 		NetworkIDs         [] string   `json:"network_ids,omitempty"`
-		Port               string   `json:"port"`
+		Port               string   `json:"port,omitempty"`
 		PortGroupID        string   `json:"port_group_id"`
 		PortMatchingType   string   `json:"port_matching_type"`
 		Regions            []string `json:"regions,omitempty"`

unifi/unifi.go

@@ -255,7 +255,7 @@ func (c *Client) do_versioned(ctx context.Context, version, method, relativeURL
 		c.csrf = resp.Header.Get("X-Csrf-Token")
 	}
 
-	if resp.StatusCode != http.StatusOK {
+	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusCreated {
 		errBody := struct {
 			Meta meta `json:"meta"`
 			Data []struct {