The REPORTS_DATABASE_USERNAME variable specifies the Linux user that is authorized to read from and write to the site's reporting database.
Alphanumeric string
teamforge_datamart
For some advanced operations, you may need to log into the database as the database user. However, under normal conditions only the TeamForge site process itself needs to access the database.
It is OK for this variable to have the same value as DATABASE_USERNAME, because they are running in separate PostgreSQL processes.