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Gracias <@877282764624375880> I just implemented it that way and it throws me this error
I have the code in this way in the Commands.js file

Cypress.Commands.add('login', () => {

  const user = Cypress.env('user')

  cy.log(`Iniciar sesión en ${Cypress.env('environment') ? Cypress.env('environment') : 'local'} environment`) 
    
    if (Cypress.env('environment') === 'pre') {
      Cypress.env('user', Cypress.env('prelogUser'))
    } else if (Cypress.env('environment') === 'prod') {
      Cypress.env('user', Cypress.env('prodUser'))
    } else if (Cypress.env ('environment') === 'dev') {
      Cypress.env('user', Cypress.env('devUser'))
    }

    cy.visit('/login')