test(signup): signup successfully

cypress/integration/signup_spec.js

+const { user1 } = require('../support/credentials')
+
+describe('Signup page', () => {
+  it('is there', () => {
+    cy.visit('/signup')
+
+    const { givenName, surname, email, username, password } = user1
+
+    cy.get('input[name="givenName"]').type(givenName)
+    cy.get('input[name="surname"]').type(surname)
+    cy.get('input[name="username"]').type(username)
+    cy.get('input[name="email"]').type(email)
+    cy.get('input[name="password"]').type(password)
+    cy.get('button[type="submit"]').click()
+    cy.url().should('include', '/login')
+  })
+})

cypress/support/credentials.js

 const credentials = {
   admin: {
     username: 'admin',
-    password: 'password',
+    password: '123456789',
+  },
+  user1: {
+    givenName: 'John Travolta',
+    surname: 'actor',
+    username: 'user1',
+    password: '123456789',
+    email: 'john.travolta@awesome.com',
   },
   author: {
     username: 'author',