It appears I do have one with the same username.
https://www.mediawiki.org/wiki/Special:CentralAuth/Akashagarwal

Hi @jayvdb, @Mattflaschen, @Legoktm , thanks for volunteering to mentor for this project and putting up a clear description for it.

Trying to make my first contribution to mediawiki and pywikibot. Although, I tried to follow all steps, not sure if I have done everything correctly. Please help me if there are any issues with it.

I am able to replicate it in a local mediawiki installation and am trying to solve it.
Those tokens are hard coded in TOKENS_1 (as suggested in T85725 ) in site.py and commenting them out from the set temporarily resolves the problem. As per my understanding, these tokens are required only when the Central Auth Extension is installed, as the corresponding API methods belong to this extension. So, I'm now trying to find a way to check whether the extension is installed and then modify TOKENS_1 accordingly. Am I on the right path and is there any simple way to do so ?

I am planning to start contributing to mediawiki and participate in GSoC this year. I found this project very interesting and have tried using pywikibot. Also, now I am going through the code base and looking at some bugs to solve.