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export function singlecLogin() {
     cy.dataSession({
      name: 'shared User',
      setup: () => cy.login(),
      validate: (x) => x === 'a',
      shareAcrossSpecs: true,
    })
  } i try like this and got cy.task('dataSession:save') failed with the following error:

> Converting circular structure to JSON
    --> starting at object with constructor 'Object'
    --- property 'window' closes the circle