1. Put necessary environment variables in .env file.
2. Install severless cli: npm install -g serverless
3. Set up AWS IAM admin user and download credentials.
4. Make sure the region in serverless.yml is the region you want to use in AWS.
5. Install dependencies: npm install.
6. Run AWS_ACCESS_KEY_ID=MY_AWS_ADMIN_ACCESS_JEY AWS_SECRET_ACCESS_KEY=MY_AWS_ADMIN_SECRET_ACCESS_KEY serverless deploy -v

There is a somewhat solid workaround to sync multiple n26 accounts with multiple budgets:

1. Copy your first account's .env file: cp .env .env2.
2. Copy serverless.yml: cp serverless.yml serverless2.yml.
3. Rename the service in serverless.yml to something that tells you what account this is referring to.
4. Update variables in .env.
5. Deploy.