Implement API V2

[kzalys]

For the Auth System V2 project.

Umbrella task for implementing v2 of the hs_auth API based on the following specification: https://documenter.getpostman.com/view/2489646/T1DjjKP6?version=latest

Children tasks:

• #82
• #83
• #84
• #85
• #86
• #87
• #88
• #89
• #110
• #117
• #118

Definition of done:

• Approved and merged PRs implementing all operations for v2 of the API as described in the specification.

[seanjparker]

Is this done now? 😯

[kzalys]

Seems like it 😃