Lost access to game :( Help

  • So I downloaded the Supremacy app one night and did not log in as my myself (profile) and just started playing as a "User". I really like the game I'm in but deleted the Supremacy app from my mobile by accident! Now I cannot get access to the game. I never changed my in game name, its just UserXXXXX. Is there a way to get back into the trenches???? Please help, thank you!