Make sso generate/populate expected behaviour clearer

[connorads]

Describe your changes

Update log line to make it clearer to first time users of granted sso generate or granted sso populate that it's not just signing in but it's also downloading accounts/creating profiles at could take longer than a few seconds.

Before: [i] Once you press 'Allow', the sign in process will complete in a few seconds
After: [i] Once you press 'Allow', the sign in process and account fetching should complete in a few seconds (can take longer if SSO has many accounts)

PS. I'm not precious about the wording feel free to edit it and push changes to the PR 🤗

Why tho?

When running granted sso generate or granted sso populate after clicking Allow in AWS on my browser I thought granted was broken because the login took longer than "a few seconds" as mentioned by the log - it was stuck there for 5-10 seconds before I would Ctrl+c and kill the granted process.

I kept doing this until one time I waited 20+ seconds and it actually worked 🫠
This is for 160 AWS accounts by the way 👀

Type of change

Updating a log statement 🤓

Issue and Documentation

See above 🤷

Testing

Please describe how the reviewer can test the changes. Also include steps to reproduce the testing environment.

1. Run granted sso generate --region eu-west-1 https://example.awsapps.com/start with your SSO URL and region
2. (Optional) Log in to AWS via newly launched browser
3. Look at terminal to see new log message ✨

Checklist before requesting a review

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• Do analytics need to be implemented?
• I have made corresponding changes to the documentation, docs PR has been linked.
• New and existing unit tests pass with my changes.
• Any dependent changes have been merged and published in downstream modules.

[JoshuaWilkes]

Thanks for the contribution!