get-express-starter/templates/express-postgres-prisma/src/validations/custom.validation.ts

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export const password = (value: any, helpers: any) => {
  if (value.length < 8) {
    return helpers.message('password must be at least 8 characters');
  }
  if (!value.match(/\d/) || !value.match(/[a-zA-Z]/)) {
    return helpers.message('password must contain at least 1 letter and 1 number');
  }
  return value;
};