fix: make the message clearer when API key is missing (#11370)

Author: pottekkat

apisix/plugins/key-auth.lua

@@ -77,7 +77,7 @@ function _M.rewrite(conf, ctx)
     end
 
     if not key then
-        return 401, {message = "Missing API key found in request"}
+        return 401, {message = "Missing API key in request"}
     end
 
     local consumer_conf = consumer_mod.plugin(plugin_name)

docs/en/latest/plugins/key-auth.md

@@ -141,7 +141,7 @@ curl http://127.0.0.2:9080/index.html -i
 ```
 HTTP/1.1 401 Unauthorized
 ...
-{"message":"Missing API key found in request"}
+{"message":"Missing API key in request"}
 ```
 
 ```shell

docs/zh/latest/plugins/key-auth.md

@@ -148,7 +148,7 @@ curl http://127.0.0.2:9080/index.html -i
 ```shell
 HTTP/1.1 401 Unauthorized
 ...
-{"message":"Missing API key found in request"}
+{"message":"Missing API key in request"}
 ```
 
 ```shell

t/plugin/cors.t

@@ -454,7 +454,7 @@ ExternalHeader1: val
 ExternalHeader2: val
 ExternalHeader3: val
 --- response_body
-{"message":"Missing API key found in request"}
+{"message":"Missing API key in request"}
 --- error_code: 401
 --- response_headers
 Access-Control-Allow-Origin: https://sub.domain.com

t/plugin/key-auth.t

@@ -173,7 +173,7 @@ apikey: 123
 GET /hello
 --- error_code: 401
 --- response_body
-{"message":"Missing API key found in request"}
+{"message":"Missing API key in request"}