Merge pull request #188 from microsoftgraph/bugfix/canary-auth

- fixes #178 adds canary url in list of valid hostnames for authentication

Author: baywet

src/main/java/com/microsoft/graph/authentication/BaseAuthenticationProvider.java

@@ -11,7 +11,7 @@
  * Provides basic common methods for all authentication providers
  */
 public abstract class BaseAuthenticationProvider implements IAuthenticationProvider {
-    private static final HashSet<String> validGraphHostNames = new HashSet<>(Arrays.asList("graph.microsoft.com", "graph.microsoft.us", "dod-graph.microsoft.us", "graph.microsoft.de", "microsoftgraph.chinacloudapi.cn"));
+    private static final HashSet<String> validGraphHostNames = new HashSet<>(Arrays.asList("graph.microsoft.com", "graph.microsoft.us", "dod-graph.microsoft.us", "graph.microsoft.de", "microsoftgraph.chinacloudapi.cn", "canary.graph.microsoft.com"));
     /**
      * Determines whether a request should be authenticated or not based on it's url.
      * If you're implementing a custom provider, call that method first before getting the token