text: const visaFields = [
      'visa_place_of_birth',
      'visa_passport_number',
      'visa_passport_issue_date',
      'visa_passport_expiration_date',
      'visa_passport_issue_authority',
      'nationality',
      'visa_embassy',
      'date_of_birth',
      'visa_street_and_house',
      'visa_postal_code',
      'visa_city',
      'visa_country'
  ];
  
  module.exports = {
      up: async (queryInterface, Sequelize) => {
          for (const field of visaFields) {
              await queryInterface.addColumn(
                  'applications',
                  field,
                  { type: Sequelize.STRING, allowNull: true }
              );
          }
      },
      down: async (queryInterface) => {
          for (const field of visaFields) {
              await queryInterface.removeColumn(
                  'applications',
                  field
              );
          }
      }
  };
  