appwrite/docs/examples/1.8.x/server-ruby/examples/functions/create-variable.md

require 'appwrite'

include Appwrite

client = Client.new
    .set_endpoint('https://<REGION>.cloud.appwrite.io/v1') # Your API Endpoint
    .set_project('<YOUR_PROJECT_ID>') # Your project ID
    .set_key('<YOUR_API_KEY>') # Your secret API key

functions = Functions.new(client)

result = functions.create_variable(
    function_id: '<FUNCTION_ID>',
    key: '<KEY>',
    value: '<VALUE>',
    secret: false # optional
)