Fix tests

Signed-off-by: Craig Perkins <cwperx@amazon.com>

plugins/identity-shiro/src/main/java/org/opensearch/identity/shiro/ShiroIdentityPlugin.java

@@ -83,14 +83,14 @@ public AuthcRestHandler(RestHandler original) {
 
         @Override
         public void handleRequest(RestRequest request, RestChannel channel, NodeClient client) throws Exception {
-            final AuthToken token = RestTokenExtractor.extractToken(request);
-            // If no token was found, continue executing the request
-            if (token == null) {
-                // Authentication did not fail so return true. Authorization is handled at the action level.
-                delegate.handleRequest(request, channel, client);
-                return;
-            }
             try {
+                final AuthToken token = RestTokenExtractor.extractToken(request);
+                // If no token was found, continue executing the request
+                if (token == null) {
+                    // Authentication did not fail so return true. Authorization is handled at the action level.
+                    delegate.handleRequest(request, channel, client);
+                    return;
+                }
                 ShiroSubject shiroSubject = (ShiroSubject) getSubject();
                 shiroSubject.authenticate(token);
                 // Caller was authorized, forward the request to the handler

plugins/identity-shiro/src/main/java/org/opensearch/identity/shiro/realm/OpenSearchRealm.java

@@ -91,7 +91,7 @@ public OpenSearchRealm build() {
     public User getInternalUser(final String principalIdentifier) throws UnknownAccountException {
         final User userRecord = internalUsers.get(principalIdentifier);
         if (userRecord == null) {
-            throw new UnknownAccountException();
+            throw new UnknownAccountException("Incorrect credentials");
         }
         return userRecord;
     }
@@ -129,7 +129,7 @@ protected AuthenticationInfo doGetAuthenticationInfo(final AuthenticationToken t
                 return sai;
             } else {
                 // Bad password
-                throw new IncorrectCredentialsException();
+                throw new IncorrectCredentialsException("Incorrect credentials");
             }
         }