Update readme.md

Author: yiiso

readme.md

@@ -1,21 +1,50 @@
 ## OAuth2 Server for Hyperf Framework
 
-
-
 ### installation
 
 ```
     composer require xtwoend/oauth-server
 ```
 
-
 ### Run on terminal
 
 ```
     php bin/hyperf.php vendor:publish xtwoend/oauth-server
-    
+  
     php bin/hyperf.php migrate
 
     php bin/hyperf.php oauth:key
 
 ```
+
+### 创建app_client
+
+```php
+$userId = $request->input('user_id',1);
+$length = 32; // 设置密钥长度
+$clientSecret = bin2hex(random_bytes($length)); // 使用 random_bytes 函数生成随机的二进制字符串，并将其转换为十六进制表示形式
+Db::table('oauth_clients')->insert([
+	'user_id' => $userId,
+	'project_id' => 0,
+	'name' => 'default',
+	'secret' => $clientSecret,
+	'created_at' => date("Y-m-d H:i:s")
+]);
+return $clientSecret;
+
+```
+
+### 测试获取 token
+
+```
+curl --location --request POST 'http://127.0.0.1/oauth/token' \
+--header 'User-Agent: Apifox/1.0.0 (https://apifox.com)' \
+--header 'Content-Type: application/json' \
+--header 'Accept: */*' \
+--header 'Connection: keep-alive' \
+--data-raw '{
+    "grant_type":"client_credentials",
+    "client_id":1,
+    "client_secret":"6f818639a2944ac2f88df1174386f39e08e963a3fd8af64c5ca59e597ea5bddb"
+}'
+```