Equivalent shell script of create user and schema in specific postgres db

Create a user and schema of same name with in ‘abc’ db through linux shell –

Psql steps---

1> [/home]# su postgres

2> bash-4.1$ psql

3> postgres=# \c abc [ set database abc]

4> abc=# create user abhra with password ‘1234’

5> abc=# alter user abhra with superuser

6> abc=# create schema authorization with abhra;

I need to create a xyz.sh file which will do the same thing and username
and password pass as argument. Like in a configuration file it will be
mentioned and in xyz.sh file will be access as $1 , $2

What should be the equivalent shell script?

Thanks