Updated dnsapi2 (markdown)

dnsapi2.md

@@ -80,6 +80,7 @@
 - [155. Use IPv64 DNS API](#dns_ipv64)
 - [156. Use Nanelo DNS API](#dns_nanelo)
 - [157. Use Google Domains DNS API](#dns_googledomains)
+- [158. Use DNSExit API](#dns_dnsexit)
 - [Use custom API](#dns_myapi)
 - [Use lexicon DNS API](#dns_lexicon)
 
@@ -1932,6 +1933,33 @@ export GOOGLEDOMAINS_ZONE="google-domains-zone"
 ```
 
 
+
+<a name="dns_dnsexit"/>
+
+## 158. Use DNSExit API to automatically issue cert
+
+
+You'll need an API key for your DNSExit account which you can find under your Account Profile. You will also need your account login (username and password).
+
+```sh
+export DNSEXIT_API_KEY="<Your API key>"
+export DNSEXIT_AUTH_USER="<Your username>"
+export DNSEXIT_AUTH_PASS="<Your password>"
+```
+
+To issue a cert, run the following:
+```sh
+./acme.sh --issue --dns dns_dnsexit -d example.com -d *.example.com
+```
+
+
+The login variables will be saved in ~/.acme.sh/account.conf and will be reused when needed.
+
+Please report any bugs/issues [here](https://github.com/acmesh-official/acme.sh/issues/4719).
+
+
+
+
 <a name="dns_myapi"/>
 
 ## Use custom API