How can I fix Composer errors in Pipelines?

One common error generated by the Composer program is as follows:

Loading composer repositories with package information
Failed to clone the [email protected]:[repo_name].git repository, try running in
interactive mode so that you can enter your GitHub credentials

In this case, Composer was unable to retrieve the GitHub repository repo_name. This may indicate that the repository requires credentials to allow access. Add an SSH key that has access to the repository to your build definition file using the pipelines encrypt command.