Database users

Until version 11.70.xC2, Informix^® database users had to be created at the operating system level and be members of the 'informix' group. Starting with 11.70.xC2, Informix supports database-only users with the CREATE USER instruction, as in most other db servers. Any database user must have sufficient privileges to connect and use resources of the database; user rights are defined with the GRANT command.

PostgreSQL users must be registered in the database with the CREATE USER command:

dbname=# CREATE USER user-name PASSWORD 'password';
CREATE USER
dbname=# GRANT ALL PRIVILEGES ON DATABASE dbname TO user-name;
GRANT

Solution

Based on the application logic (is it a multiuser application ?), you have to create one or several PostgreSQL users.