Fix username parsing
Fix username parsing

Old version appended the full server path to the username, rather than just the logical server name.
e.g. "username@servername.database.windows.net" instead of "username@servername"
Azure/azure-sql-database-samples,Azure/azure-sql-database-samples,Azure/azure-sql-database-samples,Azure/azure-sql-database-samples,Azure/azure-sql-database-samples,Azure/azure-sql-database-samples,Azure/azure-sql-database-samples