iOS

AppDelegate.m的application didFinishLaunchingWithOptions:方法

+ (void)setDeviceID:(NSString *_Nullable)deviceID;

+ (void)setUserID:(NSString *_Nullable)userID;

Android

Application的onCreate方法

@Override
public String getDid() {
 return null;
}

@Override
public String getUserId() {
 return null;
}