login static method
Use to login to get the user information.
domain
The IP or server's domain
acctID
The datacenter's ID.
username
The username to login
password
The password of the user
@return The user's information
Implementation
static Future<LoginInfo> login(String domain, String acctID, String username, String password) async {
var p = LoginParam.builder()
.acctID(acctID)
.username(username)
.password(password)
.build();
return K3Client.getInstance()
.setDomain(domain)
.login(p);
}