Add subscription to a tier

//native

type Brevo = {

  apiKey: string;

};

/**

 * Add subscription to a tier

 * Assigns a subscription tier to a specific contact within a loyalty program

 */

export async function main(

  auth: Brevo,

  loyaltyProgramId: string,

  contactId: string,

  tierId: string,

) {

  const url = new URL(

    `https://api.brevo.com/v3/loyalty/tier/programs/${loyaltyProgramId}/contacts/${contactId}/tiers/${tierId}`,

  );

  const response = await fetch(url, {

    method: "POST",

    headers: {

      "api-key": auth.apiKey,

    },

    body: undefined,

  });

  if (!response.ok) {

    const text = await response.text();

    throw new Error(`${response.status} ${text}`);

  }

  return await response.json();

}