generate-id-token.ts

async generateIDToken(uid: string) {
    const customToken = await this.admin.auth().createCustomToken(uid);
    const res = await rp({
      url: `https://www.googleapis.com/identitytoolkit/v3/relyingparty/verifyCustomToken?key=${this.apikey}`,
      method: 'POST',
      body: {
        token: customToken,
        returnSecureToken: true,
      },
      json: true,
    });
    return {
      token: res.idToken,
    };
}