In order to use Discord's API I need a token, and to get it I open a link such as
https://discordapp.com/api/oauth2/authorize?client_id=<client_id>&redirect_uri=<redirect_url>&response_type=token&scope=identify
Then I set the token as authorization (in format Bearer <token>) header of requests that are issued to the Discord's API.
Let's say I want to "logout", so that a certain token can't be used anymore to do such requests. In this case I have to revoke that token, right?
So after reading Discord's documentation and making some adjustments I decided that I have to make a POST request to a URL such as
https://discordapp.com/api/oauth2/token/revoke, and content-type header of this request should be set to x-www-form-urlencoded.
When I do it I'm getting an error message from discord's server with message saying {error: "invalid_client"}
What do I do wrong?
So the problem was in actual format of the data I was sending. I was sending JSON data because I thought that setting specific headers would automatically turn the data into the right format, but it turns out I had to use FormData object to create the data in the right format, and after that I also removed the lines where I'm setting the header explicitly, after these steps everything worked fine.