ID3. Valid integration

[microstudi]

Is the new functionality related to an issue? Describe it

Describe the solution you would like (initial requirement)

Acceptance Criteria

• [ ]

Technical specification

Technical solution

• [x] Create "valid" omniauth strategy (copy from https://github.com/gencat/omniauth-idcat_mobil)
• [x] Allow to configure it only with ENV variables or initializer config vars

Mock up (if needed)

Step by step through the test

Additional Context