405 Error method not allowed

[syntrydy]

Everything works fine but after redirect with code?= there is an error Response {type: 'cors', url: 'https://jxxxx.io/xx-config-api/ads/oauth2/api-protection-token', redirected: false, status: 405, ok: false, …}
Any idea on how to fix this ? I believe issue is at this level:

export function postWithXForm(url: string, request: TTokenRequest): Promise<Response> {
  return fetch(url, {
    method: 'POST',
    body: buildUrlEncodedRequest(request),
    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
  }).then((response: Response) => {
    if (!response.ok) {
      console.error(response)
      throw Error(response.statusText)
    }
    return response
  })
}

[soofstad]

This should be fairly simple. The library does a Cross-origin POST request to your token URL.
The token server does not allow for POST requests at that location, which it should per the OAuth2 spec.

If you are writing this token endpoint yourself, you need to change it to accept POST. If there is someone else who maintain the token API, you should file an issue at them, and tell them to keep to the spec 🙂