You can show the list of errors based on your requirement
const { ValidationError } = require("@strapi/utils").errors;
...
if (formValidationError) {
throw new ForbiddenError("Fill the form");
}
Strapi comes with a lot of error response functions here are they
HttpError,
ApplicationError,
ValidationError,
YupValidationError,
PaginationError,
NotFoundError,
ForbiddenError,
PayloadTooLargeError,
UnauthorizedError,
PolicyError,