Merge pull request #606 from Iterable/jay/MOB-5741-get-auth-token

[MOB-5741] add way to read current auth token

Author: roninopf

swift-sdk/Internal/InternalIterableAPI.swift

@@ -24,6 +24,12 @@ final class InternalIterableAPI: NSObject, PushTrackerProtocol, AuthProvider {
         }
     }
 
+    var authToken: String? {
+        get {
+            authManager.getAuthToken()
+        }
+    }
+    
     var deviceId: String {
         if let value = localStorage.deviceId {
             return value

swift-sdk/IterableAPI.swift

@@ -28,6 +28,13 @@ public final class IterableAPI: NSObject {
         }
     }
 
+    /// The current authentication token
+    public static var authToken: String? {
+        get {
+            internalImplementation?.authToken
+        }
+    }
+    
     /// The `userInfo` dictionary which came with last push
     public static var lastPushPayload: [AnyHashable: Any]? {
         internalImplementation?.lastPushPayload