Hi fellow devils

I am a United fan since 1997. I have been following this subreddit for 2+ years. I am from India and currently living in Thailand. I am moving to Europe (Spain) this august and will be visiting UK for the first time. I will be in London during the community shield and was wondering how I can secure a seat for the match vs Leicester. I believe its distributed only thru the clubs (season ticket holders). Any help is appreciated.