您正在运行的SQL与您尝试使用的用户不匹配。

The SQL you are running does not match the user you are attempting to use.

您如果不存在，将需要创建用户：

You will need to create the user if it does not exist:

CREATE USER douglas WITH PASSWORD 'vamointer';

或者，如果确实存在，则更改该用户的密码。

or if it does exist, change that user's password instead.

ALTER USER douglas WITH PASSWORD 'vamointer';

完成后，您应该会获得更多的运气。您可能还需要将权限分配给该用户。

Once you have done that you should have more luck. You may need to assign permissions to that user as well.