Fixes _access_token login issue

[mrharpo]

Motivation:

Fixes #47 - Users were getting the previous user's data from a stale _access_token

All Submissions:

* [ ] Have you followed the guidelines in our Contributing document? Document should point here: https://github.com/pysnippet/instructions?tab=readme-ov-file#contributing

• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes to Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you updated the documentation related to the changes you have made?
• Have you written new tests for your core changes, as applicable?
• Have you successfully run tests with your changes locally? (Will try tomorrow)

[ArtyomVancyan]

Although I thought the access token should be cached to be accessed more than once, it caused issues. I believe this caching can be implemented outside of the package if needed. So, after locally testing your changes, I agree with those. These changes will be included in the upcoming release.

[ArtyomVancyan]

@mrharpo, please permit me to change your branch to update the related documents and merge the pull request. You should tick the "Allow edits from maintainers." checkbox when creating the PR, but you can edit and update it now, I believe.

[mrharpo]

@ArtyomVancyan Apparently, there's no "Allow edits from maintainers" option for github organizations, which is where I forked this.

I've added you as a maintainer to our repo. Please make whatever changes you need, and let me know if I need to add another maintainer or if there's anything else I can do to help. Thanks!