Azure SQL DWH：可以与Login连接，但不能与用户连接

I am currently setting up some users for my Azure SQL DWH. I have created a Login at server level and a User at my database. However, I am getting a login failed message if I try to use my database user. If I use the Login I have created it works just fine. This Login also only has access to the views I have granted it access to. Am I missing something really obvious or is there something different about logins and roles in SQL DWH?I am currently setting up some users for my Azu