Sample code for login via Custom command

command.js

Cypress.Commands.add("Login", () => {             //Making A custom command for loggin in to the application 
  cy.request({
    method: 'POST',
    url: '/users/authenticate',                    // Base URL will be prepended which is decalred in cypress.json 
    body: {                                       //Passing Email and Password for log in
      "email": "{email}",
      "password": "{pass}"
    }
  }).then(($body) => {                        //Assertion for Response status should be 200                             
   if (expect($body.status).to.eq(200)) {
      localStorage.setItem('currentUser', JSON.stringify($body.body))   //Saving Auth token for further user Interactions
    } else {
      console.log('Login Failed', $body)
    }
  })
})