add postgres folder and script to create user

postgres/psql.md

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+use -E to show definitions of SQL used for \d commands

user.sql

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+DROP USER IF EXISTS salesreader;
+
+CREATE ROLE salesreader WITH 
+    LOGIN
+	NOSUPERUSER
+	NOCREATEDB
+	NOCREATEROLE
+	INHERIT
+	NOREPLICATION
+	CONNECTION LIMIT -1
+	ENCRYPTED PASSWORD 'md5b66677418e59ca921c20ff40534685a7';
+	
+--------------------grant--------------------------------------------------
+    
+GRANT USAGE ON SCHEMA rlarp TO salesreader;
+
+GRANT SELECT /*, UPDATE, INSERT, DELETE*/ ON ALL TABLES IN SCHEMA rlarp TO salesreader;
+
+GRANT USAGE ON ALL SEQUENCES IN SCHEMA rlarp TO salesreader;
+
+ALTER DEFAULT PRIVILEGES IN SCHEMA rlarp GRANT SELECT/*, UPDATE, INSERT, DELETE*/ ON TABLES TO salesreader;
+
+ALTER DEFAULT PRIVILEGES IN SCHEMA rlarp GRANT USAGE ON SEQUENCES TO salesreader;
+
+---------------------------revoke---------------------------------------
+
+REVOKE USAGE ON SCHEMA tps FROM salesreader;
+
+REVOKE USAGE ON SCHEMA rlarp FROM salesreader;
+
+REVOKE SELECT /*, UPDATE, INSERT, DELETE*/ ON ALL TABLES IN SCHEMA rlarp FROM salesreader;
+
+REVOKE USAGE ON ALL SEQUENCES IN SCHEMA rlarp FROM salesreader;
+
+ALTER DEFAULT PRIVILEGES IN SCHEMA rlarp REVOKE SELECT/*, UPDATE, INSERT, DELETE*/ ON TABLES FROM salesreader;
+
+ALTER DEFAULT PRIVILEGES IN SCHEMA rlarp REVOKE USAGE ON SEQUENCES FROM salesreader;