I am creating a new read/write user on SQL Azure as follows:
-- Connected to master
create login [fred] with password = \'xxx\';
-- Connected to my DB
creat
After creating the database user in the specific database Database1, again select 'master' and create database user. Execute below statement twice - one for Database1 and another for 'master'
CREATE USER appuser1 FROM LOGIN appuser1;
Unfortunately, this is not documented in Azure help https://docs.microsoft.com/en-gb/azure/azure-sql/database/logins-create-manage