getCredentials usage react native sdk

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Hello,

I have successfully implemented the auth0 biometric flow with Webauthn and token rotation using the react-native-auth0.

Currently I use the provider for authorize user to connect. After that I would like to use the getCredentials method outside a react component.

I use this code in my middleware:

const baseQuery = fetchBaseQuery({
  timeout: 12000,
  prepareHeaders: async headers => {
    const userAgent = UserAgent.getUserAgent();

    const credentials = await auth0Instance.credentialsManager.getCredentials(
      AUTH0_SCOPE,
      AUTH0_TOKEN_MIN_TLL,
    );

    if (credentials.accessToken) {
      headers.set('Authorization', `Bearer ${credentials.accessToken}`);
    }

    headers.set('Accept', 'application/json');
    headers.set('User-Agent', userAgent);

    return headers;
  },
});

The problem is that auth0Instance is not the instance created by the Auth0Provider. Is there any solution to use the function getCredentials use by the provider outside a react component ? Or should I consider another strategy to refresh the token, if so waht could be this strategy ?

I use the version 4 SDK