sample login and logout with fetch and cookie based authentication

login.js

export const login = (email, password) => {
  return new Promise((resolve, reject) => {
    let endpoint = `http://api.your-domain-here.ngrok.io/api/core/v1/sessions`;
    fetch(endpoint, {
      method: "POST",
      credentials: "include",
      headers: {
        "Content-Type": "application/json",
        "Accept": "application/json",
      },
      body: JSON.stringify({
        email: email, 
        password: password, 
      }) 
    })
      .then(e => {
        if (e.ok) {
          resolve(e);
        } else {
          reject(e);
        }
      })
      .catch(e => console.log("error::", e));
  });
};

export const logOut = (userId) => {
  return new Promise((resolve, reject) => {
    let endpoint = `http://api.your-domain-here.ngrok.io/api/core/v1/sessions/${userId}`;
    fetch(endpoint, {
      method: "DELETE",
      credentials: "include",
      headers: {
        "Content-Type": "application/json",
        "Accept": "application/json",
      },
    })
      .then(e => {
        if (e.ok) {
          resolve(e);
        } else {
          reject(e);
        }
      })
      .catch(e => console.log("error::", e));
  });
};