added possibility to pass custom base url

Author: yevheniyJ

src/main/java/com/crowdin/client/core/CrowdinApi.java

@@ -34,11 +34,11 @@ public CrowdinApi(Credentials credentials, ClientConfig clientConfig) {
             this.httpClient = clientConfig.getHttpClient();
         }
         this.clientConfig = clientConfig;
-        if (clientConfig.getBaseUrl() != null) {
-            if (clientConfig.getBaseUrl().endsWith("/")) {
-                this.url = clientConfig.getBaseUrl() + "api/v2";
+        if (credentials.getBaseUrl() != null) {
+            if (credentials.getBaseUrl().endsWith("/")) {
+                this.url = credentials.getBaseUrl() + "api/v2";
             } else {
-                this.url = clientConfig.getBaseUrl() + "/api/v2";
+                this.url = credentials.getBaseUrl() + "/api/v2";
             }
         } else {
             if (credentials.getOrganization() != null) {

src/main/java/com/crowdin/client/core/model/ClientConfig.java

@@ -28,8 +28,4 @@ public class ClientConfig {
      * Provide custom json transformer
      */
     private JsonTransformer jsonTransformer;
-    /**
-     * Base url of the server
-     */
-    private String baseUrl;
 }

src/main/java/com/crowdin/client/core/model/Credentials.java

@@ -1,12 +1,32 @@
 package com.crowdin.client.core.model;
 
-import lombok.Data;
-import lombok.NonNull;
-
-@Data
 public class Credentials {
 
-    @NonNull
     private final String token;
     private final String organization;
+    private String baseUrl;
+
+    public Credentials(String token, String organization) {
+        this.token = token;
+        this.organization = organization;
+    }
+
+    public Credentials(String token, String organization, String baseUrl) {
+        this.token = token;
+        this.organization = organization;
+        this.baseUrl = baseUrl;
+    }
+
+    public String getToken() {
+        return token;
+    }
+
+    public String getOrganization() {
+        return organization;
+    }
+
+    public String getBaseUrl() {
+        return baseUrl;
+    }
+
 }