GitHub Access Token
In order for CodePipeline to receive callbacks from GitHub, we need to generate a personal access token.
Once created, an access token can be stored in a secure enclave and reused, so this step is only required during the first run or when you need to generate new keys.
Open up the New personal access page in GitHub.
You may be prompted to enter your GitHub password
Enter a value for Token description, check the repo permission scope and scroll down and click the Generate token button
Copy the personal access token and save it in a secure place for the next step
