Adding loginas with tests circleci

[parse-github-assistant[bot]]

Thanks for opening this pull request!

• ❌ Please link an issue that describes the reason for this pull request, otherwise your pull request will be closed. Make sure to write it as Closes: #123 in the PR description, so I can recognize it.

[mtrezza]

Closing as should be merged into https://github.com/parse-community/parse-php-sdk/pull/486