How to authenticate a desktop application with a browser

This is not the correct answer, but there are several ways to do it.
For example,

There seem to be many security problems, but I think it's possible to do this.
If you decide on the API specifications, both the server side and the application side can use it even if the version is upgraded, and I think it can be used in the same company's system.
Also, depending on your ingenuity, you can strengthen your security and make them have various functions.
I think there are other better ways to do this for your reference.