1910
A more plausible explanation , they say , is that crooks used credential stuffing attacks to amass a limited number of valid Apple usernames and passwords in attempt to extort money from Apple .
 ( ransom: extort money,  Apple: victim, crooks: attacker, used credential stuffing attacks: attack pattern) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( ransom: extort money,  Apple: victim, crooks: attacker, used credential stuffing attacks: attack pattern) 