[Realm error pls help]

After many errors trying to open right the worldserver I solved it and I thinked that i can play but after creating the account and giving priviligies to it I tried to log in the game , and i entered but when I select the realm the game disconnect me. What could it be?? https://i.gyazo.com/6a2c220231df16e1533ff31e249e2d2c.mp4

[[INVALID]Worldserver error]

When I try to open worldserver it closes instantly, I have changed the username and nothing (I do not know if I have done it right)
This is the error I get:

Could not connect to MySQL database at 127.0.0.1: Access denied for user 'trinity'@'localhost' (using password: YES)
Could not connect to MySQL database at 127.0.0.1: Access denied for user 'trinity'@'localhost' (using password: YES)
Could not connect to MySQL database at 127.0.0.1: Access denied for user 'trinity'@'localhost' (using password: YES)
Could not connect to MySQL database at 127.0.0.1: Access denied for user 'trinity'@'localhost' (using password: YES)
Could not connect to MySQL database at 127.0.0.1: Access denied for user 'trinity'@'localhost' (using password: YES)
Could not connect to MySQL database at 127.0.0.1: Access denied for user 'trinity'@'localhost' (using password: YES)

 

The bnetserver open right and aparenttly functional