updated readme

README.md

@@ -154,16 +154,18 @@ services.AddHttpClient("TargetApi")
 ```csharp
 public class MyCustomInterceptor : IAuthorizationInterceptor
 {
- public async Task<AuthorizationHeaders?> GetHeadersAsync()
+ public async Task<AuthorizationHeaders?> GetHeadersAsync(string name)
  {
  //Do something and return the headers if exists in this context
  }
 
- public async Task<AuthorizationHeaders?> UpdateHeadersAsync(AuthorizationHeaders? expiredHeaders, AuthorizationHeaders? newHeaders)
+ public async Task<AuthorizationHeaders?> UpdateHeadersAsync(string name, AuthorizationHeaders? expiredHeaders, AuthorizationHeaders? newHeaders)
  {
  //Do something with expired headers if necessary and update with newHeaders
  }
 }
 ```
 
 With this configuration, the Authorization Interceptor will create a sequence of: `MemoryCache > DistributedCache > MyCustomInterceptor > AuthenticationHandler > DistributedCache > MyCustomInterceptor > MemoryCache`.
+
+> The 'name' parameter refers to the name of the configured HttpClient. With this parameter you can differentiate between multiple httpclients configured using the same interceptor.