Merge pull request #20 from paladdins/master

Update README.md

Author: jasonbahl

README.md

@@ -37,6 +37,18 @@ This secret is used in the encoding and decoding of the JWT token. If the Secret
 
 - Learn more about JWT: https://jwt.io/introduction/
 
+## HTTP_AUTHORIZATION
+
+In order to use this plugin, your WordPress environment must support the HTTP_AUTHORIZATION header. In some cases, this header is not passed to WordPress because of some server configurations.
+
+Depending on your particular environment, you may have to research how to enable these headers, but in Apache, you can do the following in your `.htaccess`:
+
+```
+SetEnvIf Authorization "(.*)" HTTP_AUTHORIZATION=$1
+```
+
+For NGINX, this may work: https://serverfault.com/questions/511206/nginx-forward-http-auth-user#answer-511612
+
 ## How the plugin Works
 
 This plugin adds a new `login` mutation to the WPGraphQL Schema.