feat: auto add env var ep payment

[field123]

Describe your changes

• auto adds ep payments environment variables so the user no longer needs to add them on their own
• changes the way authentication was handled
• adds some additional logging and error handling

Issue ticket number and link

n/a

Checklist before requesting a review

• I have performed a self-review of my code
• If it is a core feature, I have added thorough tests.
• I've added a Changeset for my changes - Click here to learn what changesets are, and how to add one

[changeset-bot]

🦋 Changeset detected

Latest commit: 2067a61

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
composable-cli	Minor
@elasticpath/composable-common	Patch

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