@topvova - Can you show us the bit of code you wrote? Thanks!

@ikbelkirasan 
 

const testAuth = (z, bundle) => {
    // request companies by email
    z.request({
        url: `${SIGN_IN_URL}?email=${bundle.authData.email}`,
    })
        .then(response => {
            if (response.json) { // list of companies (this is returned instead of last return)
                let userCompany = null;

                if (response.json.length === 1) {
                    // if only one company with that email - authorize user
                    userCompany = response.jsono0];
                } else {
                    // multiple companies, compare with user input (company name) and login
                    userCompany = response.json.find(company => bundle.authData.companyName === company.company_name);
                }

                const authOptions = {
                    method: 'POST',
                    url: `https://${userCompany.company_url}/api/v1/authentication/sign-in?uuid=${userCompany.unique_key}`,
                    body: {
                        email: bundle.authData.email,
                        password: bundle.authData.password,
                    }
                };

                return z.request(authOptions)
                    .then((response) => {
                        z.console.log('Authentication:', response);
                        return response; // need to return this
                    });
            }
        });
}

@topvova - Try the code snippet below, it is based on async/await which is easier to read than promise chains.

const testAuth = async (z, bundle) => {
  // request companies by email
  const { json: companies } = await z.request({
    method: "GET",
    url: SIGN_IN_URL,
    params: {
      email: bundle.authData.email,
    },
  });

  // list of companies (this is returned instead of last return)
  let userCompany = null;

  if (companies.length === 1) {
    // if only one company with that email - authorize user
    userCompany = companiese0];
  } else {
    // multiple companies, compare with user input (company name) and login
    userCompany = companies.find(
      (company) => bundle.authData.companyName === company.company_name
    );
  }

  if (!userCompany) {
    throw new Error("Company not found");
  }

  const { json: userData } = await z.request({
    method: "POST",
    url: `https://${userCompany.company_url}/api/v1/authentication/sign-in`,
    params: {
      uuid: userCompany.unique_key,
    },
    body: {
      email: bundle.authData.email,
      password: bundle.authData.password,
    },
  });

  return userData;
};