config/database.py contains undefined environment variables

[Jelmergu]

The database config file contains the following code

"host": env("MSSQL_DATABASE_HOST"),
"user": env("MSSQL_DATABASE_USER"),
"password": env("MSSQL_DATABASE_PASSWORD"),
"database": env("MSSQL_DATABASE_DATABASE"),
"port": env("MSSQL_DATABASE_PORT"),

which is used to get the configuration for a MSSQL database connection. The naming of the environment variables is not consistent with the rest of the config file, which all use a DB_* scheme, nor are these variables defined/mentioned in the .env.example file.

Suggestion is to either add these variables to the example file, or probably preferable, change the code to match the rest of the scheme