slim-function-optimised.js

export const createNewAccount = async (params) => {
  if (!validateCreateNewAccountParameters(params))
    throw new Error('Validation error');
  
  if (await checkUsernameExists(params.username))
    throw new Error('Username already exists');
  
  if (await checkEmailExists(params.email))
    throw new Error('Email already exists');
  
  return insertUser(params);
}