Sure, here's the script to create a SQL Server login with the user-defined role HRAdmin:
USE master;
GO
CREATE LOGIN HRAdmin WITH PASSWORD = 'HRR3p!4';
GO
USE FlughafenDB_v2;
GO
CREATE USER HRAdmin FOR LOGIN HRAdmin;
GO
ALTER ROLE db_datareader ADD MEMBER HRAdmin;
ALTER ROLE db_datawriter ADD MEMBER HRAdmin;
GO
ALTER LOGIN HRAdmin WITH CHECK_EXPIRATION = OFF;
ALTER LOGIN HRAdmin WITH CHECK_POLICY = OFF;
This script creates a new SQL Server login named HRAdmin with the password 'HRR3p!4'. It then creates a new user for this login in the FlughafenDB_v2 database, adds the new user to the db_datareader and db_datawriter roles, and turns off the Check Expiration and Check Policy options.
Please make sure to change the password to a secure one, and to modify the script based on your specific requirements.