v6.18.3

• Fix CyberPanel create() failing when the provided password contains characters rejected by the API, sanitise it to only allow alphanumeric characters and -, _, +
• Fix CyberPanel generated usernames shorter than the 3 character minimum
• Fix CyberPanel changePassword() sending passwords the API rejects, fail early with a clear error instead
• Fix CyberPanel getLoginUrl() returning a password the API rejects, change it to a random valid one instead
• Fix CyberPanel getLoginUrl() not logging the customer in, use the api/loginAPI endpoint for the posted credentials