Added External Access support

src/main/java/de/interaapps/accounts/apiclient/AccountsClient.java

@@ -106,6 +106,10 @@ public IAAuthServiceResponse getIAAuthApp(String id){
         return response;
     }
 
+    public ExternalResourcesResponse getExternalKey(String appId){
+        return post("/api/v2/oauth2/external/"+appId).object(ExternalResourcesResponse.class);
+    }
+
     public IAAuthServicePermissionGrantResponse grantIAAuthApp(String id){
         IAAuthServicePermissionGrantResponse response = null;
         try {

src/main/java/de/interaapps/accounts/apiclient/oauth2/OAuth2Client.java

@@ -2,6 +2,9 @@
 
 import de.interaapps.accounts.apiclient.AccountsClient;
 import de.interaapps.accounts.apiclient.requests.oauth2.OAuth2AccessTokenRequest;
+import de.interaapps.accounts.apiclient.requests.oauth2.OAuth2SetEASRequest;
+import de.interaapps.accounts.apiclient.responses.ActionResponse;
+import de.interaapps.accounts.apiclient.responses.oauth2.ExternalResourcesResponse;
 import de.interaapps.accounts.apiclient.responses.oauth2.OAuth2TokenExchangeResponse;
 import org.javawebstack.httpclient.HTTPClient;
 
@@ -10,7 +13,6 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
-import java.util.stream.Collectors;
 
 public class OAuth2Client extends HTTPClient {
     private final String clientId;
@@ -48,6 +50,14 @@ public boolean checkScopes(AuthorizationURLBuilder urlBuilder, List<String> scop
         return true;
     }
 
+    public ActionResponse setExternalAccessURL(String url){
+        OAuth2SetEASRequest request = new OAuth2SetEASRequest();
+        request.clientId = clientId;
+        request.clientSecret = secret;
+        request.url = url;
+        return post("/api/v2/oauth2/external").jsonBody(request).object(ActionResponse.class);
+    }
+
     public OAuth2TokenExchangeResponse exchangeToken(String code){
         OAuth2AccessTokenRequest request = new OAuth2AccessTokenRequest();
         request.clientId = clientId;

src/main/java/de/interaapps/accounts/apiclient/requests/oauth2/OAuth2SetEASRequest.java

@@ -0,0 +1,12 @@
+package de.interaapps.accounts.apiclient.requests.oauth2;
+
+import com.google.gson.annotations.SerializedName;
+
+public class OAuth2SetEASRequest {
+    @SerializedName("client_id")
+    public String clientId;
+    @SerializedName("client_secret")
+    public String clientSecret;
+    @SerializedName("url")
+    public String url;
+}