Error when getting token from context specified in .env

[obarcelonap]

Expected Behaviour

When configuring an app to use a workspace using aio app use -m Outh Service 2 Service credentials are persisted in .env file.
Example

AIO_ims_contexts_MyCredentialName_client__id=client-id
AIO_ims_contexts_MyCredentialName_client__secrets=["client-secret"]
AIO_ims_contexts_MyCredentialName_technical__account__email[email protected]
AIO_ims_contexts_MyCredentialName_technical__account__id[email protected]
AIO_ims_contexts_MyCredentialName_scopes=["scope1","scope2"]
AIO_ims_contexts_MyCredentialName_ims__org__id=imsOrg@AdobeOrg

It should be possible to use these credentials from an npm script, which is useful for initializing the application requirements (event providers/metadatas/others)

require('dotenv').config();
const { getToken } = require('@adobe/aio-lib-ims');
...
const accessToken = await getToken('MyCredentialName', {});

Actual Behaviour

It fails with the following error:

/Users/obarcelonapa/dev/test-app-builder/node_modules/@adobe/aio-lib-ims/src/ims.js:391
      scope: scopes.join(',')
                    ^

TypeError: scopes.join is not a function
    at Ims.getAccessTokenByClientCredentials (/Users/obarcelonapa/dev/test-app-builder/node_modules/@adobe/aio-lib-ims/src/ims.js:391:21)
    at /Users/obarcelonapa/dev/test-app-builder/node_modules/@adobe/aio-lib-ims-oauth/src/ims-oauth_server_to_server.js:77:21
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Object._persistTokens (/Users/obarcelonapa/dev/test-app-builder/node_modules/@adobe/aio-lib-ims/src/token-helper.js:156:20)
    at async testGetToken (/Users/obarcelonapa/dev/test-app-builder/scripts/ensure-event-providers.js:49:24)

For the error my assumption is that the IMS context is found and resolved correctly from the env file but it seems the scopes are not parsed as an array, so it fails when trying to join them when preparing the request to the IMS service.

Reproduce Scenario (including but not limited to)

Steps to Reproduce

Platform and Version

@adobe/aio-lib-ims:7.0.2
@adobe/aio-lib-core-config:5.0.1
@adobe/aio-sdk:6.0.0

Sample Code that illustrates the problem

Logs taken while reproducing problem

[aiojbot]

JIRA issue created: https://jira.corp.adobe.com/browse/ACNA-3388