I have a problem with the game WildCraft. So, just yesterday I updated the game (I didn't have enough..

I have a problem with the game WildCraft. So, just yesterday I updated the game (I didn't have enough space on my phone until now) and it recommended me to connect with Google Play, I wasn't connected with my account in the game. I connect, upload my data and all that stuff, things are good. I open the game today and I have to synchronise my game data with other data, I go to my account cloud thing and it says that I need to login again. I go to TRG's website for accounts, I type in my email but I don't remember my password. And I can't change my password either, whatever I do, the game doesn't let me change my password. Please help me?