Now, we will create the PostgreSQL database that we will use as a repository for our API. You will have to download and install a PostgreSQL database in case you aren't already running it in your computer or in a development server. You can download and install this database management system from its web page: http://www.postgresql.org. In case you are working with macOS, Postgres.app provides a really easy way to install and use PostgreSQL on this operating system: http://postgresapp.com:
Tip
You have to make sure that the PostgreSQL bin folder is included in the PATH environmental variable. You should be able to execute the psql command-line utility from your current Terminal or Command Prompt. In case the folder isn't included in the PATH, you will receive an error indicating that the pg_config file cannot be found when trying to install the psycopg2 package. In addition, you will have to use the full path to each of the PostgreSQL command-line tools...
