refactor: replace custom CRM with Monica fork

tests/cypress/integration/auth/login_spec.js

@@ -0,0 +1,11 @@
+describe('Login', function () {
+  it('should not let user sign in with a non-existing account', function () {
+    cy.visit('/');
+
+    cy.get('input[name=email]').type('impossibru@test.com');
+    cy.get('input[name=password]').type('testtest');
+    cy.get('button[type=submit]').click();
+
+    cy.get('.alert').should('exist');
+  });
+});