Update README with error type defaults

README.md

@@ -46,57 +46,64 @@ throw new ApiError(400, error, optionalArgs);
 
 ### BadRequestError
 
-extends from ApiError with a preset of status code 400.
+extends from ApiError with a preset of status code 400 and BAD_REQUEST as error.
 
 ```javascript
+throw new BadRequestError(); // or
 throw new BadRequestError(error, optionalArgs);
 ```
 
 ### NotFoundError
 
-extends from ApiError with a preset of status code 404.
+extends from ApiError with a preset of status code 404 and RESOURCE_NOT_FOUND as error.
 
 ```javascript
+throw new NotFoundError(); // or
 throw new NotFoundError(error, optionalArgs);
 ```
 
 ### ForbiddenError
 
-extends from ApiError with a preset of status code 403.
+extends from ApiError with a preset of status code 403 and FORBIDDEN as error.
 
 ```javascript
+throw new ForbiddenError(); // or
 throw new ForbiddenError(error, optionalArgs);
 ```
 
 ### InternalServerError
 
-extends from ApiError with a preset of status code 500.
+extends from ApiError with a preset of status code 500 and INTERNAL_ERROR as error.
 
 ```javascript
+throw new InternalServerError(); // or
 throw new InternalServerError(error, optionalArgs);
 ```
 
 ### UnauthorizedError
 
-extends from ApiError with a preset of status code 401.
+extends from ApiError with a preset of status code 401 and UNAUTHORIZED as error.
 
 ```javascript
+throw new UnauthorizedError(); // or
 throw new UnauthorizedError(error, optionalArgs);
 ```
 
 ### ValidationError
 
-extends from ApiError with a preset of status code 400.
+extends from ApiError with a preset of status code 400 and INVALID_INPUT as error.
 
 ```javascript
+throw new ValidationError(); // or
 throw new ValidationError(error, optionalArgs);
 ```
 
 ### AuthenticationError
 
-extends from ApiError with a preset of status code 400.
+extends from ApiError with a preset of status code 400 and AUTHENTICATION_FAILED as error.
 
 ```javascript
+throw new AuthenticationError(); // or
 throw new AuthenticationError(error, optionalArgs);
 ```