Revert "chore: update iam token endpoint (#862)"

[Chavalowrider]

This reverts commit da6aa6b.

Fixes

A short description of what this PR does.

Checklist

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• I have made a material change to the repo (functionality, testing, spelling, grammar)
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• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation about the functionality in the appropriate .md file
• I have added inline documentation to the code I modified

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[manisha1997]

Hello @Chavalowrider , what is your use-case with reverting this change?