Identity not working with MySQL

Hello, i have a problem working with Identity using MySQL, when the program enter the

 _userManager.CreateAsync(newUser, userModel.Password);

 line its from Identity, it always give an error: "connection must be valid and open to commit transaction" but when i use

_databaseContext.SaveChanges();

 It works, or when i use PostgreSQL database identity works well too, how to fix Identity problem with MySQL?