Multi account suggestion

Well i'm making this suggestion because i feel like there is something unfair over here and i will explaim my self!!! You have worked pretty much for everything in that game even the small details and u propably already thought about that! I dont understand why is player allowed to use 2-3 accounts in the same time! the only reason i can agree with that is if that helps the game generally to be more active! and i can totally agree with you but even with that there should some changes! for example : Disable(somehow i dont know how u know better) the multi account while there are competition active like this one right in hlw event who will have only 1 winner! another example! how is it fair for a player with 1 account to join and play multi bcc against some1 that use 2 or 3 accounts? im totally fine for using another account for bosses or trades or dex service anything else! because thats not effective the other players!!!! im pretty sure that u gonna agree with me because its very logical suggestion-feedbacK(even if help the games it should be some adjustesments!!! so u can make the verifycations of accounts even harder with phones or face id (just examples) and make every player use his main account and only!! as i have spoke with some guys! for some this kinda ruin the fun of the game!!! and yes ofc using 2-3 accounts dont mean that u gaurante gonna hit form or shiny or epic iv's pokemon for bcc and fcc! but when u have triple encounters by one normal player using just his account its kinda unfair! This is what i wanted to say sorry for some english and grammar mistakes mostly! im looking a head for your answer!!

P.S The game is amazing and i've spent 1000k in 2 months that says a lot(+im nerd) of how much i love it! great work to every stuff and member of your team!