Class 'Oureastudios\Laravel\BraintreeServiceProvider' not found

Kindly help me, I am new in Laravel framework

When I run my laravel project, it display error [Class 'Oureastudios\Laravel\BraintreeServiceProvider' not found]. I also try and load through composer but composer not download and give error.

composer require oureastudios/laravel5-braintree:dev-master --prefer-dist

You are running Composer with SSL/TLS protection disabled. ./composer.json has been updated Loading composer repositories with package information Updating dependencies (including require-dev) Package operations: 1 install, 0 updates, 0 removals - Installing oureastudios/laravel5-braintree (dev-master 16ebcc6): Downloading (failed) Failed to download oureastudios/laravel5-braintree from dist: The "https://api.github.com/repos/oureastudios/laravel5-braintree/zipball/16ebcc610d9d0efef8a4ec28c19c8123586f10c2" file could not be downloaded (HTTP/1.1 404 Not Found) Now trying to download from source - Installing oureastudios/laravel5-braintree (dev-master 16ebcc6): Cloning 16ebcc610d

Installation failed, reverting ./composer.json to its original content.

[RuntimeException] Failed to clone https://github.com/oureastudios/laravel5-braintree.git, git was not found, check that it is install ed and in your PATH env.

'git' is not recognized as an internal or external command, operable program or batch file.

require [--dev] [--prefer-source] [--prefer-dist] [--no-progress] [--no-suggest] [--no-update] [--no-scripts] [--update-no-dev] [--update-with-dependencies] [--update-with-all-dependencies] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [--sort-packages] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--] []...

Thanks in advance.

via Chebli Mohamed