Provide additional output values following the create action

[loiclefevre]

Description

This PR adds database_protocol, database_port, and database_user as output parameters to the create command.

Fixes #18
Fixes #19

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings