werckerを使用してherokuにデプロイしたいです

###前提・実現したいこと
railsで開発してアプリをGithubにPushした際、werckerを使用してビルド、Herokuへのデプロイを行いたいと思っております。
rspecのテストは無事に終了しますが、deployがどうしても上手くいきません。
werckerとHerokuに詳しい方がおりましたらご教授下さい。

###発生している問題・エラーメッセージ

 create mode 100644 test/models/user_test.rb
 create mode 100644 test/test_helper.rb
 create mode 100644 vendor/assets/javascripts/.keep
 create mode 100644 vendor/assets/stylesheets/.keep
 create mode 100644 wercker.yml
starting heroku deployment with git push
Warning: Permanently added the RSA host key for IP address '50.19.85.156' to the list of known hosts.

 !  Invalid path.
 !  Syntax is: git@heroku.com:<app>.git where <app> is your app's name.
 !  
 !  SSH Key Fingerprint: 7a:15:53:67:83:ff:99:e1:36:d0:9a:df:37:7d:1f:b0

fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
git pushed exited with 128
push failed, retrying push in 5 seconds
starting heroku deployment with git push
Warning: Permanently added the RSA host key for IP address '50.19.85.154' to the list of known hosts.

 !  Invalid path.
 !  Syntax is: git@heroku.com:<app>.git where <app> is your app's name.
 !  
 !  SSH Key Fingerprint: 7a:15:53:67:83:ff:99:e1:36:d0:9a:df:37:7d:1f:b0

fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
git pushed exited with 128
heroku toolbelt not found, starting installing it
finished heroku toolbelt installation
type heroku: heroku is /usr/local/heroku/bin/heroku
Installing Heroku Toolbelt v4... done.
For more information on Toolbelt v4: https://github.com/heroku/heroku-cli
heroku-cli: Updating to 5.6.16-3391c63... done
Updating Heroku CLI...done. Updated to 3.43.16
heroku version: heroku-toolbelt/3.42.15 (x86_64-linux) ruby/2.3.0
heroku-cli/5.6.16-3391c63 (linux-amd64) go1.7.5
You have no installed plugins.
failed: git push to heroku failed

###該当のソースコード
wercker.ymlのデブロイの部分です。
環境変数は全て設定したつもりです。

yml
1deploy:
2    steps:
3        - heroku-deploy:
4            install-toolbelt: true
5            key: $HEROKU_KEY
6            key-name: HEROKU_KEY_PAIR
7            user: $HEROKU_USER
8            app-name: $HEROKU_APP_NAME
9        - script:
10            name: Update database
11            code: heroku run rake db:migrate –app $HEROKU_APP_NAME
12    after-steps:
13        - wantedly/pretty-slack-notify:
14            webhook_url: $SLACK_WEBHOOK_URL
15            channel: slack-test
16