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You will need to copy the cleint client secret into the cod for this to work.
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Update the code to match your keycloak setup.
Once the code has compiled create your docker image using: Dockerfile_oauth2
Start the service using: oauth2.yaml
This program uses PKCE code_challenge and code_challenge_method parameters when making the authorization code request and the PKCE code_verifier parameter when exchanging the authorization code for a token.
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