docs: public Request<EmailTemplate> get(String templateName) {
          Asserts.assertNotNull(templateName, "template name");
          HttpUrl.Builder builder = baseUrl
                  .newBuilder()
                  .addPathSegments("api/v2/email-templates")
                  .addPathSegment(templateName);
          String url = builder.build().toString();
          CustomRequest<EmailTemplate> request = new CustomRequest<>(client, url, "GET", new TypeReference<EmailTemplate>() {
          });
          request.addHeader("Authorization", "Bearer " + apiToken);
          return request;
      }