Update cheatsheets

tldr/createuser

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# createuser
+
+> Create a PostgreSQL user (role).
+> More information: <https://www.postgresql.org/docs/current/app-createuser.html>.
+
+- Create a user interactively:
+
+`createuser --interactive {{username}}`
+
+- Create a user with no special rights:
+
+`createuser {{username}}`
+
+- Create a superuser:
+
+`createuser {{[-s|--superuser]}} {{username}}`
+
+- Create a user allowed to create databases, manage roles, and prompt for a password:
+
+`createuser {{[-d|--createdb]}} {{[-r|--createrole]}} {{[-P|--pwprompt]}} {{username}}`
+
+- Create a user without the ability to create databases or manage roles:
+
+`createuser {{[-D|--no-createdb]}} {{[-R|--no-createrole]}} {{username}}`