code clean up and refactoring

components/identity-extensions/backend-oauth-authenticator/src/main/java/org/wso2/carbon/identity/authenticator/backend/oauth/validator/impl/ExternalOAuthValidator.java

@@ -79,7 +79,7 @@ public class ExternalOAuthValidator implements OAuth2TokenValidator{
         boolean isValid = tokenValidationResponse.getValid();
         String userName = null;
         String tenantDomain = null;
-        if(isValid){
+        if (isValid) {
             userName = MultitenantUtils.getTenantAwareUsername(
                     tokenValidationResponse.getAuthorizedUser());
             tenantDomain = MultitenantUtils.

components/identity-extensions/backend-oauth-authenticator/src/main/java/org/wso2/carbon/identity/authenticator/backend/oauth/validator/impl/LocalOAuthValidator.java

@@ -49,12 +49,12 @@ public class LocalOAuthValidator implements OAuth2TokenValidator {
         boolean isValid = tokenValidationResponse.isValid();
         String userName = null;
         String tenantDomain = null;
-        if(isValid){
+        if (isValid) {
             userName = MultitenantUtils.getTenantAwareUsername(
                     tokenValidationResponse.getAuthorizedUser());
             tenantDomain =
                     MultitenantUtils.getTenantDomain(tokenValidationResponse.getAuthorizedUser());
         }
-       return new OAuthValidationResponse(userName,tenantDomain,isValid);
+        return new OAuthValidationResponse(userName, tenantDomain, isValid);
     }
 }