Add postgresql_datauser.sh

Added bash script, finished and tested.

postgresql_datauser.sh

@@ -0,0 +1,43 @@
+#			postgresql_datauser.sh
+#			----------------------
+#
+# Very basic script to create a database on mysql whit its own user
+# and password to be used by an application like a website,
+# cloud, etc.
+# As of the date below it has only been tested on mariaDB sql server.
+#
+# by Jony Silva, with AI help
+# Wed 31 Dec 06:30:54 UTC 2025
+# Anti-copyright and/or BeerWare.
+
+#!/usr/bin/env bash
+message1="Creating database, user and password for new application."
+message2="Give me DataBase user:"
+message3="Give me DataBase user password:"
+message4="Give me DataBase name:"
+message5="Give me host (press enter for default \"localhost\"):"
+
+echo $message1
+echo $message4
+read newDb
+echo $message2
+read newUser
+echo $message3
+read newDbPassword
+echo $message5
+read host
+
+if [ -z "$host" ]
+    then host=localhost
+fi
+
+# PostgreSQL commands
+sudo -u postgres psql -p 5432 << EOF  # Change port accordingly
+CREATE DATABASE ${newDb};
+CREATE USER ${newUser} WITH PASSWORD '${newDbPassword}';
+GRANT ALL PRIVILEGES ON DATABASE ${newDb} TO ${newUser};
+\c ${newDb}
+GRANT ALL ON SCHEMA public TO ${newUser};
+EOF
+
+echo "Database '${newDb}' and user '${newUser}' created successfully!"