Changed the parameter type AuthorizationType to TargetType in the token closure;

Added MultiTarget pattern of "Access Token Auth" to AccessTokenPlugin docs.

Sources/Moya/Plugins/AccessTokenPlugin.swift

@@ -62,7 +62,7 @@ extension AuthorizationType: Equatable {
  */
 public struct AccessTokenPlugin: PluginType {
 
-    public typealias TokenClosure = (AuthorizationType) -> String
+    public typealias TokenClosure = (TargetType) -> String
 
     /// A closure returning the access token to be applied in the header.
     public let tokenClosure: TokenClosure
@@ -92,8 +92,8 @@ public struct AccessTokenPlugin: PluginType {
             else { return request }
 
         var request = request
-
-        let authValue = authorizationType.value + " " + tokenClosure(authorizationType)
+        let realTarget = (target as? MultiTarget)?.target ?? target
+        let authValue = authorizationType.value + " " + tokenClosure(realTarget)
         request.addValue(authValue, forHTTPHeaderField: "Authorization")
 
         return request

docs/Authentication.md

@@ -45,6 +45,22 @@ let token = "eyeAm.AJsoN.weBTOKen"
 let authPlugin = AccessTokenPlugin { _ in token }
 let provider = MoyaProvider<YourAPI>(plugins: [authPlugin])
 ```
+If you use `MultiTarget` with different token, you can do like this:
+
+```swift
+let fooToken = "eyeAm.AJsoN.weBTOKen.foo"
+let barToken = "eyeAm.AJsoN.weBTOKen.bar"
+let authPlugin = AccessTokenPlugin { target in 
+    if target is FooService {
+        return fooToken    
+    } else if target is BarService {
+        return barToken
+    }
+    return ""
+}
+let provider = MoyaProvider<MultiTarget>(plugins: [authPlugin])
+```
+
 The `AccessTokenPlugin` initializer accepts a `tokenClosure` that is responsible
 for returning the token to be applied to the header of the request.
 

docs_CN/Authentication.md

@@ -44,6 +44,22 @@ let authPlugin = AccessTokenPlugin { _ in token }
 let provider = MoyaProvider<YourAPI>(plugins: [authPlugin])
 ```
 
+如果你使用 `MultiTarget` 且返回不同的令牌，你可以像下面这样:
+
+```swift
+let fooToken = "eyeAm.AJsoN.weBTOKen.foo"
+let barToken = "eyeAm.AJsoN.weBTOKen.bar"
+let authPlugin = AccessTokenPlugin { target in 
+    if target is FooService {
+        return fooToken    
+    } else if target is BarService {
+        return barToken
+    }
+    return ""
+}
+let provider = MoyaProvider<MultiTarget>(plugins: [authPlugin])
+```
+
 `AccessTokenPlugin` 构造器接收一个`tokenClosure`闭包来负责返回一个可以被添加到request头部的令牌 。
 
 2. 您的 `TargetType` 需要遵循`AccessTokenAuthorizable` 协议: