Added NumbersClient class

src/main/java/com/bandwidth/sdk/numbers/NumbersClient.java

@@ -0,0 +1,37 @@
+package com.bandwidth.sdk.numbers;
+
+import org.asynchttpclient.AsyncHttpClient;
+import org.asynchttpclient.AsyncHttpClientConfig;
+import org.asynchttpclient.DefaultAsyncHttpClientConfig;
+import org.asynchttpclient.Realm;
+
+import static org.asynchttpclient.Dsl.asyncHttpClient;
+
+
+public class NumbersClient {
+
+    private static String BASE_URL = "https://dashboard.bandwidth.com/api";
+
+    private final String account;
+    private final AsyncHttpClient httpClient;
+
+    /**
+     * Credentials to access Bandwidth's Numbers api
+     *
+     * @param account Your account id to use on dashboard.bandwidth.com
+     * @param username Your username to login to dashboard.bandwidth.com
+     * @param password Your password to login to dashboard.bandwidth.com
+     */
+    public NumbersClient(String account, String username, String password) {
+        this.account = account;
+
+        AsyncHttpClientConfig httpClientConfig = new DefaultAsyncHttpClientConfig.Builder()
+                .setRealm(new Realm.Builder(username, password)
+                        .setUsePreemptiveAuth(true)
+                        .setScheme(Realm.AuthScheme.BASIC))
+                .build();
+
+        httpClient = asyncHttpClient(httpClientConfig);
+    }
+
+}