refactor: clean code

internal/pkg/sdk3rd/cachefly/api.go

@@ -0,0 +1,11 @@
+package cacheflysdk
+
+import (
+	"net/http"
+)
+
+func (c *Client) CreateCertificate(req *CreateCertificateRequest) (*CreateCertificateResponse, error) {
+	resp := &CreateCertificateResponse{}
+	err := c.sendRequestWithResult(http.MethodPost, "/certificates", req, resp)
+	return resp, err
+}