Update all curl documentation examples and references with new x-medusa-access-token header

[irab]

What

This is to update incorrect documentation in regards to authentication to the Admin API - raised in #6264.

Why

Because the current documentation has been incorrect since the September 2023 release of v1.17.0, which had breaking changes to API token usage.

How

Simple search and replace. I was asked to replace occurrences under www/apps/docs/content/ but there were also additional places where I thought references should also be updated:

• packages/medusa/src/api/
• www/apps/api-reference/

Feel free to revert them as needed.

There is also some inconsistency between the format shown in examples e.g. <API_TOKEN> vs {api_token} vs {access_token}.

I have kept the format the same in all cases as the original, as surrounding documentation text would not have format updated as well. I suggest maybe reviewing the documentation and keeping to a consistent format e.g. <API_TOKEN>.

Testing

I have not tested these changes. I would assume the packages/medusa/src/api/ changes may need more thorough testing?

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[shahednasser]

Thanks for your contribution! A couple of things to note:

• This header is only used for admin API Routes. No changes should be done to store API Routes. So, please revert the changes under the packages/medusa/src/api/routes/store directory.
• Files under the www/apps/api-reference/specs directory are generated automatically, so make sure to revert those changes as well. Instead, you can run the yarn openapi:generate command in the root of the monorepository and commit the generated changes. Make sure to do this after you revert the changes mentioned in the first point.

I also added a comment below.

[shahednasser]

Those API routes are store routes so please revert the changes.

[irab]

Done

[shahednasser]

LGTM