bad authorization: 400 Bad Request: invalid_grant

[betandr]

I know this has been raised before although I can't seem to work out what the issue is. I've tried registering the app in the web UI preferences and also with [go-mastodon](https://github.com/mattn/go-mastodon) and whatever I try I get bad authorization: 400 Bad Request: invalid_grant in response.

I've tried the following code (obviously with the correct values) and I can't get it to work, any ideas I could try?

Thanks!

package main

import (
	"context"
	"log"

	"github.com/mattn/go-mastodon"
)

func main() {
	app, err := mastodon.RegisterApp(context.Background(), &mastodon.AppConfig{
		Server:     "https://the.server",
		ClientName: "my-client",
		Scopes:     "read write follow",
		Website:    "https://github.com/the/path",
	})
	if err != nil {
		log.Fatal(err)
	}

	cl := mastodon.NewClient(&mastodon.Config{
		Server:       "https://the.server",
		ClientID:     app.ClientID,
		ClientSecret: app.ClientSecret,
	})
	err = cl.Authenticate(context.Background(), "user@example.com", "password")
	if err != nil {
		log.Fatal(err)
	}
}

[mattn]

Probably, your mastodon server stop to support grant_type=password.

[betandr]

Ah, I've added some debug in go-mastodon and it yields: The provided authorization grant is invalid, expired, revoked, does not match the redirection URI used in the authorization request, or was issued to another client

[betandr]

Do you have a code example of using the mastodon.AuthenticateToken function?

[RasmusLindroth]

Do you have a code example of using the mastodon.AuthenticateToken function?

I'm on my phone so I can't write a good example. But checkout how I do it in tut.

Here's how I register a new account in my program.

https://github.com/RasmusLindroth/tut/blob/2634818c0a1097da935d7137b3620249e679223b/auth/add.go

To use the access token once you have generated it you'll just have to include it in your config like this.

conf := &mastodon.Config{
	Server:       acc.Server,
	ClientID:     acc.ClientID,
	ClientSecret: acc.ClientSecret,
	AccessToken:  acc.AccessToken,
}

[sbani]

That works @RasmusLindroth. However, the AuthenticateToken() works only once. Reuse of the same code seems to be forbidden. Do you have an idea on how to reuse the code? I obviously don't want to register a new app each time I restart my tool

[RasmusLindroth]

That works @RasmusLindroth. However, the AuthenticateToken() works only once. Reuse of the same code seems to be forbidden. Do you have an idea on how to reuse the code? I obviously don't want to register a new app each time I restart my tool

You just run AuthenticateToken() once, then you use:

conf := &mastodon.Config{
	Server:       acc.Server,
	ClientID:     acc.ClientID,
	ClientSecret: acc.ClientSecret,
	AccessToken:  acc.AccessToken,
}
client := mastodon.NewClient(conf)

Now you can use the client for your requests

[sbani]

Wow, it's so easy. That works, thank you!

[ktpx]

The example on the main page fails.

c := mastodon.NewClient(&mastodon.Config{
Server: "https://mstdn.jp",
ClientID: "client-id",
ClientSecret: "client-secret",
})
err := c.Authenticate(context.Background(), "your-email", "your-password")
if err != nil {
log.Fatal(err)
}

atleast when i tried. Need to add accesskey and remove the authenticate part.