[eb0la]

That's not a chatbot: it's an agent :-)

I've got a similar use case, but I was thinking about Slack and not telegram: whenever I want to write something in my blog, send a message to the agent to enable the wp-admin parts of my blog.

After writing I could just tell the agent to block wp-admin entirely.

Not extra high/pentagon-grade secure; but enough to block login attempts (and maybe some exploits).