appwrite/docs/examples/1.5.x/server-ruby/examples/users/update-name.md

require 'appwrite'

include Appwrite

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

users = Users.new(client)

result = users.update_name(
    user_id: '<USER_ID>',
    name: '<NAME>'
)