How to use:

1. Download source code to your computer
2. Put your API key to keys folder in the sources.
3. Install gems using bundle installcommand in the terminal.
4. If you have errors with your ruby version, change in .ruby-version and Gemfile files to your Ruby version.
5. Call in the terminal:

OTI=ORIGINAL_TRANSACTION_ID KEY=SubscriptionKey_YOURKEYID.p8 bin/subscription ISS=3ac3c13e-68bc-4d3d-8310-a7339bbbba44 ENDPOINT=/v1/apps KEY=AuthKey_YZ6X5BRP9U.p8 bin/start

where ORIGINAL_TRANSACTION_ID is your original transaction id and YOURKEYID is your Key ID.