#8700 Give Cypress a chance to retry

cypress/support/commands.js

@@ -375,7 +375,8 @@ Cypress.Commands.add('createUser', user => {
 	if (!('password' in user)) user.password = user.username + user.username;
 	if (!('password2' in user)) user.password2 = user.username + user.username;
 	if (!('roles' in user)) user.roles = [];
-	cy.get('div[id=userGridContainer] a:contains("Add User")').click();
+	const addUser = cy.get('div[id=userGridContainer] a:contains("Add User")');
+	addUser.click();
 	cy.wait(2000); // Avoid occasional glitches with given name field
 	cy.get('input[id^="givenName-en_US"]').type(user.givenName, {delay: 0});
 	cy.get('input[id^="familyName-en_US"]').type(user.familyName, {delay: 0});
@@ -398,6 +399,8 @@ Cypress.Commands.add('createUser', user => {
 	cy.route('POST', '**/grid/settings/user/user-grid/update-user-roles*').as('rolesSaved');
 	cy.get('form[id=userRoleForm] button[id^=submitFormButton]').click();
 	cy.wait('@rolesSaved').its('status').should('eq', 200);
+	// Once the interface refreshes, the "Add User" should be removed from the DOM and recreated.
+	addUser.should('not.be.visible');
 });
 
 Cypress.Commands.add('flushNotifications', function() {