fix: fetch token using @nextcloud/auth which updates the token on context

When a new token needs to be fetched we should use the function from the
library which automatically also sets the new token on the current
context (global state).
It also handles calling the on-token-update events.

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

Author: susnux

lib/interceptors/csrf-token.ts

@@ -6,7 +6,7 @@
 import type { CancelableAxiosInstance } from '../client.ts'
 import type { InterceptorErrorHandler } from './index.ts'
 
-import { generateUrl } from '@nextcloud/router'
+import { fetchRequestToken } from '@nextcloud/auth'
 import { isAxiosError } from 'axios'
 
 const RETRY_KEY = Symbol('csrf-retry')
@@ -31,8 +31,7 @@ export function onCsrfTokenError(axios: CancelableAxiosInstance): InterceptorErr
 			&& response?.data?.message === 'CSRF check failed') {
 			console.warn(`Request to ${responseURL} failed because of a CSRF mismatch. Fetching a new token`)
 
-			const { data: { token } } = await axios.get(generateUrl('/csrftoken'))
-			console.debug(`New request token ${token} fetched`)
+			const token = await fetchRequestToken()
 			axios.defaults.headers.requesttoken = token
 
 			return axios({