Cant get in

Lots of people play this game so I decided to get it it said for me to enter my username and password and when I did it said I entered the wrong password even though it was the first time I ever even played the game!!!!! So I cant even start the game for the first time!!!!!! Whats wrong with you people!?!?!?

Turtle lover 5000 about Pokémon GO, v1.31.0