Introduced generic access token handler for requirement T

[acn-sbuad]

Description

Created a generic access token handler where requirement can be injected in Program.cs. No longer setting context failed if requirement isn't met as there might be multiple handlers. Only setting succeeded if everything runs ok.

Base class for actual validation of access token to avoid duplication of code.

Related Issue(s)

• altinn/altinn-events#318

Verification

• [x] Your code builds clean without any errors or warnings
• [x] Manual testing done (required) - [ ] Relevant automated test added (if you find this hard, leave it and we'll help out)
• [x] All tests run green

Documentation

• [x] Added readme

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

75.8% Coverage
0.0% Duplication