Adding in support for getting AWS tokens

Author: pahimar

src/main/java/com/creatubbles/api/core/Creditional.java

@@ -0,0 +1,5 @@
+package com.creatubbles.api.core;
+
+public class Creditional {
+    public String session_token, secret_access_key, access_key_id;
+}

src/main/java/com/creatubbles/api/request/amazon/GetAmazonTokenRequest.java

@@ -0,0 +1,18 @@
+package com.creatubbles.api.request.amazon;
+
+import com.creatubbles.api.core.CreatubblesRequest;
+import com.creatubbles.api.response.amazon.GetAmazonTokenResponse;
+import com.creatubbles.api.util.EndPoints;
+import com.creatubbles.api.util.HttpMethod;
+
+public class GetAmazonTokenRequest extends CreatubblesRequest<GetAmazonTokenResponse> {
+
+    public GetAmazonTokenRequest(String accessToken) {
+        super(EndPoints.AWS_TOKEN, HttpMethod.GET, accessToken);
+    }
+
+    @Override
+    public Class getResponseClass() {
+        return GetAmazonTokenResponse.class;
+    }
+}

src/main/java/com/creatubbles/api/response/amazon/GetAmazonTokenResponse.java

@@ -0,0 +1,9 @@
+package com.creatubbles.api.response.amazon;
+
+import com.creatubbles.api.core.CreatubblesResponse;
+import com.creatubbles.api.core.Creditional;
+
+public class GetAmazonTokenResponse extends CreatubblesResponse {
+    public String error, expires_at;
+    public Creditional creditionals;
+}